Defenseless can also be associated with players who are 20 yards BEHIND the play, standing there minding their own business.
I'm sorry, but on a run play, you are fair game between the time the ball is snapped, and when they whistle the play dead. If you want to split hairs, then if you flag what UGA did, you're going to have to flag people for nailing the QB on any option play. Should they just not allow sacks on QBs if they fake a hand off too? How many yards away from the play is considered "away from the play"? Its going to open a big can of worms if you flag what the UGA player did. It still doesn't change that it was cheap. But it was legal.