Well, first of all, the MPI data won't be altered, so your name will stay on the banned GUID unfortunately.
However, the admins apparently can search for aliases, so they should be able to view the MPi data behind the GUID too. If they actually looked, they'd find a list of 85 aliases on 1 GUID. So either the owner is nuts and made 85 accounts, or he is spoofing names (or both). I vote for the spoofing, seeing the amount of aliases. They should have known better before banning you.