My first reaction after seeing your post is that perma ban for a single plagiarised post is a little bit too strict for my taste (even though he was lying about how it happened) and I would rather see him getting longer signature ban so if he continues being active and prove to a usefeul member of the forum, then to lift it off.

But as always when people start digging in these cases, seems like that's OPs M.O so perma ban is imho well deserved. I have no doubt that he will create another account and continue with business as usual because for him bitcointalk is nothing but a milking cow.