End zone pass interference.?

I watch a game yesterday the receiver was in the end zone had to jump up and reach behind him to catch the ball.

The defender grabbed the guy's face mask and pulled him down to the turf.  HARD!

 I believe when in the end zone and it's a blatant, possibly dangerous, pass interference like that it should be an automatic touchdown.

 It's getting old to constantly see them taking the penalty to stop a touchdown.

 They have rules to protect the quarterback and a kicker...What about some that protect a receiver while he's in the air in a vulnerably position?