commented by freebeer (2018-06-12 09:47:40+00:00): I've not seen any particular infestation which I've not cleared out.  NYC might have the highest density now; there are a number of GNIS nodes there pointed out, and a lot of notes there can be solved by a quick edit if correct.  That nobody has done so compared with Cali says a lot about the distribution of active mappers.
.
Pascal's site has some issues I observe, like occasionally missing an update (I saw an opened note today that was closed four hours earlier), and often your comments only show up hours later.  But I suspect that are due to its SQL queries rather than things getting lost.  Where I have seen unfamiliar notes from two months ago I remember I took a break for maybe a month.  Normally I review everything in the US, and I have tried to clear out advert spam a few times a week in Canada, the UK and Australia, as well as review countries with a high level of junk notes (Philippines, Nepal, Bangladesh, Cuba, and a bunch of others) or where spam runs combined with tourist maps.me mapping have caused spikes and a day of cleanup for me (India (Goa), Cyprus) but are mostly behaved.  Sometimes.
.
I have found if one makes a regular purge from a list, it keeps things geographically under control particularly over such a large USian area with low note density.  I've tried to check new notes every few hours I'm awake in the US and maybe a third can be closed with no action.  The number of advert spams alone would increase the overall number by a couple thousand each year if unchecked.  Near NYC I purged several hundred in a small area about a year ago.
I hate to think how things would look without action, as it seems the feedback to the spammers has caused them to alter tactics, themselves resolving their own notes promptly after posting the spam, which I observe happens during what look to be eastern or further european working hours.  Most of the US spammage is posted anonymously now, several km from actual location, although yesterday one was pinpointed in NYC directly on the address, so despite the lengthy ad copy I let it pass for someone else to slaughter.
.
The canadian spams seem to use throwaway named accounts so far.
.
I did a run through Cuba a year ago and it was pretty bad.  The past days I resolved a bunch more.  Probably a lot are rubbish but for me is a language barrier.  In Cuba there are a few tourist areas where a webmaster used to map a pension and then open a note, while of late it seems the open note is all that is added with no bother to map the amenity for map search or anything, leading me to wonder what map apps make use of notes on their displays, beyond the OSM main website.
.
There is also an area along the cuban coast with an infestation of notes where someone with a Real Editor needs to come in and make an update while on holiday, assuming the notes are accurate.  I found none I could clear out after my last pass months ago.  You will also notice a summer surge in notes while people take their holidays in many areas, as well as worldwide.
.
I've no clue about the majority of South Korean notes because of the language/script.  I can't even guess at the note content, as you might expect.  Somehow with an active community, they are being ignored, but then, many countries seem to have no note resolution apart from the occasional purge from outside, unlike the US where there are almost always green markers to be found.
Pascal's site's graphs show that well, along with the penetration of maps.me mapping.by the surge in 2016 and which countries like the Philippines are heavily affected.  Most closed spikes, like last month in Nepal of some 600, are linked to me.  Those from mid- to late-2017 are part of a world tour I made, while starting late 2017 I would also focus on a country.  I am not the only person responsible, however I can identify my activity such as several purges of the Philippines.  And nearly all is without editing the map.
.
Somehow these observations are better suited to an egotistical diary entry rather than this note that will disappear from view shortly.
.
By the way, speaking of bogus maps.me, Jaypep got a new one ripped in several locations resulting in complete reverts, if you've not seen.  Seems now there is more quality control about maps.me spam, but I do hope those responses are not all hand-composed, for the sake of the proofreaders' burnout.  User 5359 has a lot of kezboard macros for such a case and uses them dozens of times daily plus many more quiet edits of newbie mistakes.
His work in changeset commentaries show just how far OSM would sink into spam and advertising and outright vandalism for commercial interests.
.
The thing about cleaning the crap notes is it makes it possible to concentrate on the others.  This is like my fourth pass through Kathmandu (or however it's spelled) after the green markers disappear to reveal more red ones that got lost earlier.  A lot of what I see remaining are simple names of businesses or offices at a point that have not been added, and which I just can't be arsed, fearing too much of the same would simply encourage more use of notes to do mapping rather than engaging one into the addiction of editing and contributing.
,
Your maps.me use (I am shocked, shocked I say, and I think I'll have to cross you off of my list of friends.  Let me see... Big pile, nope, those are enemies.  Try the small notepad next to it.  Abba,  Abigail, Acerbic, Adele, wait what?  Oh silly me, I've forgotten me alphabet.  Now to find a marker.  A nice big fat-tipped permanent marker.  The one I don't use for full-body tattoos.)
If there is a maps.me review process, which I doubt, they won't be able to be submitted under your own name.  Have you just left notes, or have you deleted an item?  It might be there's an option you have to enable,maybe hidden under weasel language, like `enable sharing with other mappers around  the world, post reviews of restaurants, give travel tips, make friends in your neightbourhood an' join the worldwide #maps.me community!!!'
You probably misseed it but maybe a week ago there was a maps.me victim in Germany who insisted he knew nothing about OSM and was purely working with maps.me, and had never signed up with OSM and never used it and would never anyway.  So I've no idea how they present themselves, other than I see an increasing amount of notes references to the maps.me map and trying to reach maps.me (or Niantic) support via notes.
My maps.me observations are just that, an attempt to reverse-engineering understand what it does and why.
.
The note activity in the US (some 2500 a month) is about half that of germany.  I think I made a rough guess that the daily note rate worldwide might be about one new note a minute.  This is very rough, if at all close.
Pascal's feed site for notes appears to get an hourly update at xx:03, viewed in the raw data before the feed reader takes over for me.
I am tempted to propose the addition of numbers to each country's page to aid in decisions to view a list or not.  Say, `opened(238), commented(24), reopened(8), or closed(935)' which could point out unusual activity like spammers re-opening their ad copy, and save me the time of checking the South Korea trickle when a continuous stream elsewhere gives me more Notes Score Gamepoints.  Just wanted to see if you had an opinion on that.
.
There is a tyrasd QA site I wasn't able to get working for me yesterday in a short time behind my fascist firewall which I think I had used earlier without a feedreader, as well as a feed direct from the API but which is limited to a 25 degrees area bbox, that I'll probably play with more today after getting the feed for Null Island yesterady.  And maybe decide how many feeds I need to monitor the world.  Not that I can get started with any arabic, hebrew, tamil, korean, chinese, japanese, ...
.
The US open numbers have slowly increased from some 28'000-ish when I started to pay attention to 29'000 today, while the total number is approaching 100'000.  That is, say for every five new notes, two go on the long-term open pile, while three get resolved quickly.  So the number of open notes increases slowly, while the number of closed notes increases more rapidly, thus the ratio open/closed follows a decreasing trend, or I believe it's displayed for the US as a green number as closed/open.
The addition of summary numbers for the last week, rather than just overall, will help show the current trend of note activity, which you can see in monthly granularity in Pascal's javascript graphics.  Thanks to your activity, May's closed/open ratio was one of very few above 1.  That of Feb also corresponds to Kimbo's St.Valentine's Day massacree, August 2017 might be when I scoured the US for low-hanging fruit, after getting started with notes.  When was that hurricane anyway?  I lose track of time.
.
I regret I re-opened two or three notes today.  Now you can scribble all over my name on *your* List.