The ladder system

Well, in the Diablo 2 1.0 expansion patch, they introduced the mail system that can recover the password. Maybe they can do it for Starcraft too? Like um, for an account you need to enter an email address and Blizzard also locks onto your CD Key. Then, when they detect a hack, they mail you a warning, after the third warning or so, they ban your CD Key. I think thats a way of stopping cheaters huh? They can't change email address to get away since the CD key is there. And honestly, if they can't stop after being given three chances, they really should deserve to be banned. I think it might work, and if they say that they the email address isn't theirs anymore and crap, Blizzard can just turn their head to it like they did to Lost Hardcore Diablo Characters. Why listen to the nagging if they shouldn't be hacking to begin with?