I have no first hand knowledge, but I would be surprised if a 2.5 year old account with 250 of karma (like you do) is not considered established enough for this purpose.
Not that I'm complaining of course. I think I've only used my downvote powers once normally. The only other time I've used such powers was when I noticed some spam comments, and chose instead to flag them on the noobcomments list.
I honestly think that something like my level of karma is too high a limit for posting things like an RMS. This place isn't reddit, so I take my comments on here a lot more seriously. As such, I don't comment nearly as often since I don't usually feel I have a comment of sufficient intelligence to contribute.
Really, I'm quite amazed anytime I see my karma increase here. I have a definite inferiority complex when reading some of the great comments here.
With experience like that, building any measure of karma could be a slow and arduous process for the typical new user. Unfortunately, I'd imagine a lot of people working on their first project would have the same sort of inferiority complex, yet they would be exactly the sort to benefit the most from an RMS sort of post.
In fact, I'm building (very slowly, thanks to inexperience and a bit of RSI) my first "major" project, and I had hoped to show it off here first, but now that same "I'm not worthy" feeling is making me feel like it wouldn't be welcome.
I think the grandparent (xatax) is being far too timid, I am sure 221 karma is enough to do anything on here that any other non-moderator is allowed to do.
I guess it also makes sense not to have submission downvotes, since the really bad posts will just get killed, and the iffy posts just won't get enough points to get very visible.
Thanks for the explanation.
EDIT: added emphasis
But the bar is much lower than that. For the purpose of just keeping spam accounts out, I think the combination of a karma threshold with average non-karma accruing activity over time (such as upvoting others, clicking through on articles, etc) could be an effective filter.
I'm usually afraid to say something wrong, since I know that there are always experts on the topic of the post. It makes more sense to me to let said experts explain a particular topic than to possibly disseminate wrong information, even though I might have a useful perspective to add.
The issue is if people that see that you're wrong, instead of correcting you, just downvote you. In my opinion, a wrong statement should not be buried with downvotes, it should stay at 1 point with a reply that corrects it and that get a lot of upvotes.