AB Ed - it seems the same offensive people are either breeding in numbers or re-surfacing under an alter-ego. As there's nothing to stop them using fake e-mail addresses, can't you do what other sites do, e-mail them a code [they'll need a valid address then] before they're allowed to sign in for the first time. You can then block the addresses whose users are unpleaseant. Eventually they'll give up and go and play somewhere more suited to their warped ideals?
You could always just ignore them as a matter of urgency.
The vast majority of these joke questions seem to get replies and often from the very users who come straight here to complain about them!
BTW thanks for that hint about being able to use a fake email - I didn't know that.
Great suggestion paulz! boognish76- I think the reason the silly questions get replies is because people get so wound up with the stupid, offensive postings. And express how they feel to the poster.