okay, i think i figured it out....
He bought DB + New copy of d3. Wiped out and did a fresh install of windows before installing it. Lvled his toon to 60. At that point, he ran his bot and it instantly crashed after entering the auth key. He thinks he tried everything he could, but just couldn't get DB to run. And BAM! December 18th, he's banned! And he was never even able to get DB to run.
hmmm? i did the best i could
if this is what hede told us it might even be a good information. That means against all odds, it might not be server side detection?