All the tree huggers will have a hissy but my opinion is that, similar to giving non professional football players an rpo or whatever physics manual and expecting them to base their play on analysis and thought, football officials are given too much that is unnecessary to work with, and they keep trying to walk their way around this pretty much every season, until football becomes akin to an antelope trying to run past a pride of lions. The armchair fan then says you better 'teach' your players not to do this and not to do that, but it doesn't work that way; in a game like football, a violent game by its nature, players on the field are zoned in on the moment, in many cases the millisecond. The extra caveats (most targeting calls, the horse collar nonsense, oh yeah new rule quarterbacks are now protected as an endangered species, etc) do not come to mind in those moments and milliseconds; sorry, it doesn't. If its flagrant (and flagrant is like porn, you know it when you see it) or obvious (offsides etc) it should be called. If its a football play its not flagrant, otherwise its no longer football. To not do so puts the game in the hands of the officials who can do as they please, as demonstrated not only by ever increasing controversial judgement calls but by the lack of concern shown by the league offices. A properly officiated football game does not require flagging 23 'infractions.'