"Staring down receivers" is something all QBs do. I once made a video of Brady and Rodgers doing that (surprise, I know), and it's fairly easy to see why they do it. It's either a pre-snap read that has a receiver in iso-coverage, or it's a post-snap read that shows a favorable matchup that the QB wants to see the receiver take advantage of, or it's simply the play call. All due respect to those who think that any QB is guilty of it (not even talking about Bradford), but you're not thinking this through.