Are you asking if they will permanently ban you if you get caught again? Blizz has never removed accounts. They've permanently banned accounts, but they have never removed them.
If you come back and start botting again, you most likely will receive an 18-month suspension this time, which is almost the same as being permanently banned.
no, im asking if blizzard continues banning accounts for only leveling a char.
I think its pretty obvious what you are asking. People here can be dicks even though they too know what you mean, but act like they don't to try and make you look bad.
You are asking if just botting for leveling purposes only is something you can get banned for...the answer is yes. Botting the economy (Gathering, farming gold, AH etc.etc..) appears to be a bit more risky.