I always thought it would be interesting to separate the post-side and the read-side in such a manner. You'd post to #programming, and then the reader would subscribe to #programming/user_xyz to pick up the moderation feed with xyz as the god-mod. This solves the bootstrapping problem where new subs have nothing to read. Unfortunately it's hard to do persistent standards keeping that way. If xyz has a no-memes policy do you ban all posts from everyone who ever posts one to the global tag, or do you individually inspect every post?