Just logging into an account would not account for it, I don't just see an IP and blindly declare it as an alt, that would be foolish. I'm well aware sometimes people share accounts, sometimes accounts get shuffled around as collateral, sometimes someone may buy an account or somehow acquire one that scammed after the fact, none of this would result in a false positive with my methodology.

It's convenient how I was right about so many accounts (~40), but not the few that would prove you to be a scammer.