NFL Might Suspend Players for Violent Hits

[SBXVII]

Ok so I was wondering....

Since we keep hearing what defenders are not allowed to do, it might be easier if the NFL simply tells the defenders what they "are" allowed to do.

Also, I can see and agree with defenders being punished/suspended a game if they lead with their helmet on a helmet to helmet hit. Thats intentional, but what if the defender leads with his helmet to knock the ball out of the opponants hands and the opponant is falling to the ground and helmet to helmet is accidental?

Will offensive players get fined also for leading with their helmets? RB's especially do that when they know their about to hit by the defender.

What happens when the RB lowers his helmet to hit the defender and the defender in order to protect himself lowers his helmet and they hit helmet to helmet? who gets fined? only the defender? both? or just the player who ends up with out a concussion?