Perhaps they should implement an anonymous reporting system. Any player, regardless of position, gets their "bell rung" on a play, they hit a button and that gets compiled into data which is later analyzed.
If anyone remembers Eric Lindros' career, fuck...
No penalties called, that was a "clean hit." Yet, it took almost 2 decades to make those types of hits illegal in most sports (except soccer, because they die every time the take a step on the pitch).
Towards the end: "that's a good hit though..."