Karma threshold required to submit "Ask HN's"

I don't like this at all and would down vote it if that were an option. I joined this forum so I could post an "Ask HN". That was the very first thing I did. And I have seen people do throwaway accounts to ask questions anonymously who are (presumably/apparently) members in good standing but have some valid reason to not want to ask under their regular account. I have in recent weeks been thinking that it might make some sense to let people post an Ask HN with a new account but not post other submissions until they have a certain karma threshold. The people who submit spam are frequently brand new accounts and seem to not participate in the forum at all. People who are new (or using a new account) and doing an Ask HN are much, much more often looking for legitimate feedback than folks who start posting other types of submissions from a new account.

The only hesitation I have is that in another forum I used to participate in, in place of karma, they used post-count as their measure and when they instituted a post-count threshold for getting certain privileges, people would join, make like 25 inane, pointless posts to hit the threshold and, voila, get the privilege they sought. However, since karma works very differently from post count, it is probably far less abusable.

Also, please do not limit comments per day.

For the most part, the options listed do not appeal to me. They are mostly a "big stick" approach to problems. There is a time and a place for that but please, please do not turn HN into some version of what people are complaining goes on at International airports in the US. Polite, civilized behavior is something which occurs by mutual agreement and is rooted in genuine respect, not fear of reprisal. You can model that and you can foster that but you cannot beat people into genuinely respecting you/each other or being sincerely polite.

Edit to reply to this piece:

Super-bonus extra special bonus round: if you've been here for more than 500 days and think HN's S/N hasn't degraded over the last 6 months, tell us all why! My perception is that most veterans think it has.

Not saying it "hasn't degraded" but it seems to me that a lot of the folks on the leader board are older members -- by that I mean they are not 23 years old but tend more towards their 30's and 40's. A recent poll of the age distribution of the site has caused me to stop and reassess "tone" of some of the comments. I'm 45. Most folks here are a lot younger than I am. "Young and clueless" sometimes sounds rude and disrespectful but often is not. If they are just youthful and exuberant and you reply factually to their erroneous assumptions, young people are typically way more willing to step back from their initial position than older people are -- unless, of course, you reply in an ugly way, in which case it rapidly degrades. So that has influenced my recent behavior to be a bit slower to assume someone is being an arse. It has helped make my recent experience more positive as well.

I don't know if the age distribution has changed or not from "the good old days". I just know that information made me look at posts in a different light.