Discourse is most productive near the very limits of civility.
I love a lot of things about my iPhone. But the spell checker thing for texting is not one of them. I think the thing was designed by the same people who wrote that Hungarian to English translation book for the old Monty Python skit.
Essentially there aren't any. If at some time some vitriolic troll happens to start annoying me in my own house, then that may change. But before that can happen, more than 5 people will have to actually visit the site so I'm not too worried about that. Sorry to add the verification step, but unless spammers are going to pay me - no free lunches!