Wow, I am as angry about the pussification of the NFL as anyone. The defender is in the air and the receiver goes low and we have a penalty and fine. Get real.
However, I have always hated dirty play. It's different. Dennis Smith tried to hit you legally very hard. Romo tried to gouge your eyes out in the scrum. Suh is dirty. The Raiders were historically dirty. Constantly.
We can penalize dirty and still stop the crap calls on good hits made at high speeds. One is cheap, the other is good football being taken out of the game.