I agree with this proposition. You shouldn't be able to cut block period. It risks their livelihood as players IMO. If someone can't block the guy in front of him then he needs to get off of the field. Chopping at a player's leg/joint is the equivalent to a player driving all of his weight into a QB after the pass was released; it promotes shoulder injuries and broken collar bones. In this instance, it can cause unnecessary injuries to the ACL or MCL.