It's like any other penalty in any other league, there only watching certain players. Roy Williams ( Dallas Cowboys Safety ) had the rule basically built just because of his very aggressive tackling, he's basically the only person that gets flagged for it. Same thing with hitting wide recievers when they jump up for a pass, only the top 5 or so defenders will get flagged for that. Same thing when a QB gets hit late, if he's a rookie or a no-named QB then it will have to be pretty bad to get flagged, while on the other hand you can't even touch a QB like Brett Favre or Peyton Manning or they'll eject the player, anybody watch Panthers vs. Tampa Bay, they hit Chris Simms late on every single play, I thought they were gonna kill him. Heck same thing happens in basketball, look at players like Shaq, if you even come close to touching him or a player like Kobe Bryant they call a foul, heck they give Shaq 2 extra steps while in the paint, he travels everytime he gets the ball and nobody calls it. Dewayne Wade gets every call in the world in his favor just because the NBA is trying to make him a " Mike Jordan type". They even admitted it lol Look at the Dallas Mavericks vs. Miami Heat game's last year, the Heat averaged about 7 fouls a game while the Mavericks had around 40 or so per game, that's just rediculous and just another way that a league protects its big money players.... What they need to do is get rid of all the late hit and rouching the passer penalty's in the NFL, those protected players are just another player, they have shoulder pads and a helmet, if you don't wanna get hit, take a knee or get the F off the field, I don't see anyone making a roughing the lineman rule when a QB throws a interception and one of the linebackers just absolutely blasts one of the lineman trying to make a tackle, might as well give the QB a flag and he's down whenever someone pulls it out. The way the league is going in 5 years they will just be playing flag football. The main reason I played and watch the game is for the bonecrunching hits. kinda like nascar, if they took the big wrecks out of it nobody would watch it