I beg to differ. There are plenty of guys hurt every year, at all different levels of the sport, that get hurt and knocked out of a game by legal, textbook tackles. Whenever you have a full contact sport like football where you are crashing into each other at full speed, things are going to happen.
I totally agree that there is no place for a "bounty" system in the NFL or at any other level, but its naive to think that a defensive player isn't trying to hit the player on the opposing side of the ball as hard as they can to make them think twice about what they are doing, and when you hit as hard as these guys do stuff happens. If these were vicious, illegal hits being done by the Saints players then they should have been being flagged, ejected and fined and this didn't happen because I have yet to see any evidence of intentional, illegal hits being made by the Saints players anywhere. ESPN can come up with some pretty random crap and I have yet to see anything from them showing these illegal hits. Just say'n.