I don't really see what the Doh! is in that. Their first name would be banned, so when they go to login with said first name, they couldn't get in. That's how it would work, no? Since that person's never to be seen again, I don't see why others can't reap away that last name for themselves. Maybe when the person is banned, they could have their name changed to only one name instead of a first and last, so they'd be easier to ban?