I remember when the Saints got flagged in the NFCCG against the Vikes for wiping him out on an end around. I was livid because:
#1 I didn't think it was an illegal hit. He was a blocker and they took him out en route to the runner.
#2 Because of the exact video you showed. I remember he either ended that guy's season or put him out for a while with that cheap shot. So as a defense why wouldn't you blow him up before he takes a cheap shot at your knees and ends your season or career?