Controversial Calls?

Week 11 in the NFL had a couple controversial calls in crucial parts of the game. First, in the Saints and 49ers game, the refs threw a flag on Ahmad Brooks for hitting Drew Brees in the head and neck area. Drew Brees fumbled on the play too and that could have sealed a win for the 49ers. The Saints tied the game with a field goal and later hit the game winning field goal as time expired. I thought the call was accurate as it says in the rule book that they cannot hit the other player in the head or neck area. I do feel like they protect the players a little to much but you cannot go after another players head or neck. That could cause serious damage to the player and could possibly end their football career. Plus, Drew Brees was bleeding from the play so that shows Brooks hit him in the head. Second, in the Patriots and Panthers game, the ref threw a flag on the very last play of the game but picked it up and called off the penalty. Replay clearly shows that Rob Gronkowski was held by Luke Kuechly before the ball was intercepted. The ball was somewhat uncatchable by Rob but we do not what would have happened if he was not help by Luke. Rob was unable to turn around an attempt to catch the ball because Luke was holding him from coming back to the ball. Any other play this would have been called for pass interference, but since it was the last play of the game they did not call a penalty. If they want to get the right calls and not have any controversy, they should use replays more often.