NFL's new safety policy

What do you guys think of the NFL headquarters changing the way defense is played. Like most people I don't want to see guys get seriously injured when watching a game. However, I love smash mouth, hard hitting, good tackling defense. I enjoy that as much if not more than watching the offense score touchdowns. I have no problem with the NFL going after deliberate hits to the head. But for going after James Harrison for making a smart football move is ridiculous. Whats you take?