I think the idea is to keep all posts relevant to this community. If in fact there are too many "fun" posts, the posters should be asking why they're putting it here (especially if it'll be on Reddit).
Faced with the choice of too many new users diluting the site (by upvoting junk), and too much bad content, I'd rather be accepting of new users, and very, very ironhanded with regards to acceptable content. If we allow any content and any users, new users who are more interested in [pics] and why McCain or Obama is a dork, and that kind of extraneous junk will eventually dominate the site.
