My thinking is that we can't just go around banning everything that offends someone. In real life, where you need your right to expression, nothing that's "offensive" should be banned as long as the person who's saying/doing/whatever the offensive things is not being violent or violating anybody's rights. However, in a private setting (e.g. a forum), I don't mind if people remove something that could offend people. A forum, ideally, is somewhere you go to enjoy yourself.
In fewer words, personal freedom to express yourself in real life is vital. On a forum, it's not vital.
