So i have seen this happen a few times this week and last weekend, someone is tking, he changes his name during the match (possibly through the console), and he continues on tking, i just saw a guy kill someone 6 times in 20 minutes. It seems that if they change their name in game, their tk list gets wiped clean as the game thinks he is a new player perhaps?

It's another thing that trolls are now using to tk people, sometimes they copy someone's name and try to get the original nameholder banned if their is a admin present.