ortotorto (2020-01-14 16:15:19+00:00): That's good point which I want to follow as well -- signposts, guides, brochures etc. should use the same names as are written on maps. But which/what map? What if signpost shows name from some other map that was published under license which is not ok for the OSM?

Many (big majority of) signposts on mountain trails in Slovenia has also data about its altitude, but many are wrong. So what "ele:" should we put to the OSM, the actual "as on the ground" number measured by LIDAR or arbitrary number from some other source with proven quality problem? I think guideposts don't define names and altitude, they use names and altitudes from maps.

About rescuing - rescuers are usually locals who know more names than you can find on a map.
And name itself is not data for geolocating a place!! Name is an attribute, property of place, you cannot use it instead of coordinates. Ok maybe on a small area it is possible (and that is how all names were born - to geolocate a place by it attributes/properties/characteristics without or before era of GPS), but when you talk about a whole mountain range or region or country it is not enough, because there are many occurrences of the same names, especially those very generic.

We have 2 "Plesišče" in the Julian Alps. And the other "Plesišče" has the same problem as that one near Viševnik - it is misplaced on a map! You can check it by yourself, there is no doubt: https://ttn.muzej.si/#17/46.39322/13.86594
That name was also transcribed to TTN from Imenoslovje Julijskih Alp by Dr. Tuma, where he mentiones it as 
- "Plesišče, (Tanzboden)*", between Visoka Vrbanova Špica (2408 m) and Vrbanova Špica (2299 m). -

What did they do on a TTN map? They've put it exactly to the midpoint between those two peaks with no effort of locating it correctly! In reality you cannot miss Plesišče https://www.google.com/search?q=plesi%C5%A1%C4%8De+vrbanove&client=firefox-b-d&tbm=isch&source=iu&ictx=1&fir=FHmajeCd9deavM%253A%252CgqjJFmHgq-uAtM%252C_&vet=1&usg=AI4_-kRHjT6vXcoPW2kRgIk7BqEL2ocIag&sa=X&ved=2ahUKEwiqudvXtYPnAhVa4KYKHakFCQkQ9QEwAXoECAYQBQ#imgrc=_&vet=1 , but it's location is actually much more to the north - https://www.openstreetmap.org/node/3250655683
*Dr. Tuma writes an interesting note at the bottom of page:
- "Tanzboden" is name that was given to that place by German hunters. But because we have Slovenian name for the same morphological phenomena (see flat area on a southern ridge below Viševnik called "Plesišče" and "Plesalica" above village Brda nad Terom), we can translate it to "Plesišče". -

So when some accident would occur there, what should one tell rescuers? That he/she is on Plesišče or not - mountaineers and especially rescuers know where Plesišče near Vrbanova špica really is and will not trust map about it. So why should we have map that you cannot trust at all?

Misplacements of names on TTN map like that are really many and newer maps inherit(ed) those mistakes because maps authors are lazy and just trust old sources.

Then you have many places that are named in the OSM and people (mountaineers) know them by that name but you cannot find them on any other map, guidepost or guide. Should we delete them to avoid confusion?

Another category of names - I've added many names of peaks, pillows, ravines in Slovenian Alps, which are known to mountaineering public and can be found only in some guidebooks - like those famous places in the Triglav north wall: https://opentopomap.org/#map=17/46.38608/13.83854 They are mentioned in books, guides, articles, but we were never able to put them to a map because nobody woud go there and measure their location and altitude. With LIDAR it has changed and know they are geolocated and measured.

I can see that we have different views on OSM mission:
1) names on maps should reflect what other sources (non regarding their accuracy) say and stick to them to avoid confusion
2) names on maps should be a reliable source for other sources to use

My attributions to OSM database are more in the scope of 2), because why would we need OSM at all if we would just copy other maps?

REZI - yeah it is pretty shitty source, a great list of names and type of objects they name but locations are useless.