[FRPLG]

Jeff Fisher seems to think it is reasonable:

“The ballcarrier is still going to be permitted to lower his shoulder, and the head is also going to come down to protect the football,” Fisher said. “We’re not taking that part of the run out of the game. What we’re saying is, in space, one-on-one, head-up, we’re not going to allow you to load up and use the crown of your helmet. It’s an obvious thing.”