Some rules are meant to be broken. Others are meant to be changed. Some will remain the same.
The NFL's annual league meetings allow those discussions to occur in what can sometimes be an airing of grievances for the 32 organizations. Some years come with more fanfare than others, with the passionate debate mostly centering on the potential "Tush Push" ban this year.
Football is a kid's game, so it's only natural that some would rather take their ball and go home when they don't like the game.
It's not all controversial, however.
Rule change proposals surrounding the kickoff, overtime in the regular season and more aren't being met with as much resistance.