Do you want to have restrictions for account names?

[Acountified]

Honestly, I've yet to find any names as potentially offensive as some of the artwork on the cards.

I mean, the artistic skill is obvious and irrefutable, but, really, who signed off on "Bloodlust" being a naked girl in the rain?

Who wouldn't sign off on a naked girl in the rain?

But seriously, names "are" not offensive as such. It's more that people interpret them as such. iluvKunts is a good example of this. They can be meant offensive of course, but nothing stops you from interpreting them as for example idiotic.

[WarSocket]

Yes, but some nick intend to insult; it's not that the creator wouldn't expect it (e.g. any disrespectful mother jokes).
It's not like I am that kind of an moral apostel, but come on, if somebody calls u "asshole" and you don't know him, than there isn't that much of an interpretation space... (most likely ^^)