Remove or change the change name prompt.

[Mageziya]

I've done this once before, I was a wizard and set my name to that of the captain as a joke. I was inspired by a time a clown set their name to my name when I was captain and I found the situation then pretty funny, though the clown didn't do a good job of acting on it and just got drunk and did nothing.

I can definitely see the problems though. One suggestion was identity check, which could work. Another, which might be possible with the fancy chat system we have, is to hide the chat until your name is chosen, then show it, including any that occurred while you were picking your name, after you've picked your name.