Rules are simple....don't hit another player on the head with your helmet and don't hit a defenseless receiver. These guys want to get on the highlight real instead of making solid tackles. Fck'em, suspend and fine them. And for all those whining about not being able to play football the way it is meant to be or thinking about quiting the game...the door is right there, the arena league would love to have you.
Heap hit is clearly obvious and so is the Harrison hit. Not sure about the Jackson hit but he was defenseless.
p.s. The NFL put a stop to the horse collar tackle a few years ago by
suspending Roy Williams one game and I don't see anyone complaining about it anymore. This is no different and if you don't like it go f'ing watch UFC fights.