LOL.
Fact:
You can ban any/every key ever issued (and more) without even installing the game and running a server.
It would be a chicken shit thing to do...but it is easy.
They did the same thing with PBBans, they'd probably remove all the "false" bans eventually.
Lol will they fuck , if they do they will have to refund everyone who bought new key because of a false ban.