Correct me if I'm wrong, but didn't all teams have cameras until a league wide memo went out? Then, it was just the Patriots who continued?
Belichick showed arrogance, he got hit with a hefty fine to his wallet.
AFAIK, Williams was the only person to have this bounty system set up, and they were told to stop and continued anyway while lying to the league. That, and the actual intent to injure is much more severe. Had they stopped initially, no serious penalties would have occurred.
I get the Tim D. thing, but IMHO think that actually throwing games on purpose for money is a bit more serious than video taping to gain an edge. Both cheating, though, I do agree.