Your account is your own responsibility regardless of whomever may end up using it. We are pretty strict with that, because we commonly get excuses, saying that their "friend, brother, cousin, dog, whatever" used their account as a scapegoat to get back on and grief some more.
I have no jurisdiction over the Automatic Grieftrap System, so either wait for an admin's reply or wait out the ban.
Oh, and BTW... my_taco hasn't even LEFT the game. He is still online right now.