When tell me when blizzard u will start punishing people

WHEN PEOPLE GET BANNED FOR GRIEFING OTHERS. IS THAT OK TO LEAVE 15 KEY AFTER 1 PULL??>?? I DONT WANNA PLAY THIS GAME BLIZZARD. THANK YOU.

Warpróphet-Silvermoon sh***ty warrior tank after 1 pull in NW15 leaved the key. IS THIS OK. when ppl got banned for such fkn things. IN WHAT AM I WRONG? I DEMAND HIS BAN. have proves. we had no wipe, all was good, he just turned and leaved the instance. I HATE THIS GAME and love it. after such sittuations I wanna I never played it. ban him