There is now no such thing as a good clean hit. They are all potentially dangerous and need to be banned from the game. Further, it is necessary that we should use 5 minutes of replay to determine if two helmets contacted one another, and if this happens the player must be ejected. We can simply not tolerate hard hits above the stomach, and these players need to made examples of. After all millions of dollars are at stake with the health and future of this game, and really isn't that what it's all about?