Take a harder line against individuals who constantly derail threads to the point where any flow of ideas becomes impossible. I'm not referring to the occasional off-topic aside, but to individuals who do nothing but post completely off topic, baiting material, presumably for the purpose of spoiling the enjoyment and interaction for others. I know that we have an Ignore feature, but why not promote good behaviour as policy instead of just asking people to close their eyes constantly? We all occasionally toss asides in, but better judgement is needed when those posting to the original theme of the thread are getting pissed off, and post their frustration in the thread repeatedly.

For those of us who care little about the gallery portion of the site, but value the conversational aspect highly, this is a big one. Lately there have been threads specifically about site improvement suggestions, banning procedures, as well as interesting non-site related topics that melt into oblivion once the usual suspects show up.

I know that enforcing something like this would be completely subjective, but so are most decisions the moderators make that aren't age or multiple account related.