Yep, pretty sure he might think that he has a foolproof method^^ But he only thinks that because he has no idea of how unbelievably detailed the Logs of MMOs are
Only thing that would be nice to know is if only the perm banned have been flagged for the checkups. I bought like 500+ Items and have been suspended for 72h. In theory I could have no idea that I am supposed to delete them (because I did not have to tell them I will) and without any notice by Anet to me directly I think I will keep them.