+1 for the suggestion in your second paragraph, although IME the problem users typically don't show up until after the site has already established itself (i.e. there is a population of users available to annoy), so during the first stages (when the users are, by definition, more dedicated than the casual ones that show up later) everyone is pretty much well-behaved, and the population is small enough so that the moderator can take care of any problems that do occur.

+1 for the suggestion in your second paragraph, although IME the problem users typically don't show up until after the site has already established itself (i.e. there is a population of users available to annoy).

So during the formative stages of a site (when the users are, by definition, more dedicated than the casual ones that show up later) everyone is pretty much well-behaved, and the population is small enough so that the moderator can take care of any problems that do occur.