That is a lot of digging, I highly believe that his profile had that deep digging because of what he does to spammers and scammers, the guy exposes a lot of spammers and scammers and it must be some sort of revenge attempt that worked well, he does hold a part of the responsibility but this can also discourage other members who actively fight scammers and spammers, because if they happen to have made a small mistake a long time ago, the results will be obviously "terrible".
I hope Theymos will be a bit more flexible on the permaban subject, perhaps adding a date exclusion to this would be of a better idea IMO.