Okay guys plz just listen to me. Name changer will be abused hard and I will explain how. 1st You do a bunch of crap to get you screenshotted and reported. 5 Seconds later you change your name. No one gets banned because you don't have their number therefore the report is useless.
You obviously didn't read this:
If I ban a player “Foo” and he changes name to “Bar”, will he stay banned?
Yes. Same for whitelisted players and oped players. They also keep their inventory, pets, statistics and everything they own on a server.