I didn't say start with X posts, I said let people filter on everyone who has had X posts.
Those contributors who have less posts can step it up and get their post count up, sign up as a developer, or only talk to those of us who read everything any way (as I said, I read slashdot at 0 as well).
Hm. I'm of the opinion that an a priori filtering of people based on their postcount has the danger of being too disruptive, even with the possibility of developer accounts and such.
I'm mostly a lurker here (as my regdate to postcount ratio shows), and what has astonished me here time and again was the fact how interesting conversations would start here, out of nothing, and often with newcomers joining in.
On one hand those could be professionals with valuable information/insights/knowledge which were directed to a certain thread (possibly about a topic they were involved in), but on the other could be laymen with relativly simple questions/statements that themselves still spawned interesting stuff by knowledgable regulars. Especially the latter is something I _never_ have seen anywhere else in this intensity, and I think it would suffer.
The philosopher's stone would be a system that presents a low barrier of entry but a high barrier for generating noise, while keeping the need of moderation at a bearable level.
Since slashdot was mentioned - we already had a rating system once. I know it didn't last, but IIRC one problem was that it was too much focused on positive reinforcement (i.e. getting high-starred posts).
What about a system that allows for downrating noise-generating posts (restricted to regulars of course, maybe needing some checks to prevent misuse) without too much focussing on '+5 Insightful' (which I don't think is needed or even beneficial in this environment here), combined with the ability to filter by this rank.
In addition, one could install some sort of automatism about people whose posts get downranked often enough.
Another partially related idea: If restricted forums were to be established, even newcomers could post there (to allow for a low barrier of participation), but only a miniscule amount of posts (2? 3?). Those posts would then have to be deemed worth enough by the regulars to allow the newcomer to continue to participate (again possibly via ranking/voting, and again, without focus on positive reinforcement other then the "entrance pass").
Those are just some ideas, but even while the Console Forums do have their problems, I still don't know any other forum (as a whole) that manages to keep that high a level of signal/noise and in-depth discussion while still having a high accessibility to newcomers - both experts and laymen. And I'm afraid that significantly raising the barrier of entry could destroy that.
</insomniafuelledrant>