i've played on a number of sites (and they all crash) and no one has found a way to prevent obnoxious posts.
i sort of skip though them and treat it as backround noise.
censorship proposals seem to just create a whole new conflict - between advocates and opponents of censorship - and this might be a motive.
that is, as is well-recorded, the best way to get a book read is to have it banned by a library.