this is not an accusation, this is a question.
if you are a pirater i think you can generate 1337 keys. but you cant level another account fast back without hacking xp -> reset or ban.

They have banned some accounts XD. As in not that many.

Don't know why, maybe politic of their behavior changed...but some time before there was politics for baning the KEY and reseting the ACC to beginning. if they started to ban only key, that's a pity.

How do you know they only ban the key?

i read it somewhere. and its logical in some way isnt it? if there is a hacker and you ban his acc hell come back with another account and probably make the MP go to hell with his cheats, but if you ban the key hell have to buy another copy..