There are. Tons. I'll let you figure out who yourself. That's really all I have left to say. He deserve what he got.
There are tons of people who have received the "I will ban you on sight even if you buy a new key" treatment which pretty much says you can never play Blockland ever again?
Permanent bans and revokes are common, but if I'm not mistaken, Marble Man can't even buy a new key and come back? If I've got that wrong, please let me know.