Should a mod be able to ban content they believe is objectionable (such as racism, off-topic, headline does not match title) or behavior they think is annoying (such as downvoting too much, criticizing the mod team)? On the one hand, users get to choose which subs they use, so if moderation gets out of control they can just use an alternative sub, or create their own. On the other, we'd surely lose some of the magic that makes this site great if we got a big migration of snowflakes from some other site. One somewhat popular subreddit could overwhelm the entire site, making us into basically reddit (without the admin fuckery).