You do appear to be asking why you are getting booted for being AFK after being reported. Presumably if you didn't stand around leeching and getting reported then you wouldn't get booted.

It's not rocket science.

As for why one account gets treated differently to the others. No idea. You'd have to ask Blizzard or whomever is doing the booting vs debuffing. We have no access to the kind of information you are after.