Every year, the competition committee reviews rules. I'm hoping that instead of just adding new ones, they'll start looking at simplification.
The Dave Casper Rule is intended to keep a player from deliberately fumbling the ball forward at the end of a half to keep possession on a fourth-down play, move the ball closer for a field goal, etc. The infamous "Holy Roller" play from a Raiders-Chargers game in the 1970s was one of the motivations for this rule, and I still have no idea why this rule only applies at the end of a half . . . if it's fourth down and a ballcarrier is about to be stopped short of the first down marker, he's got an incentive to fumble the ball forward in a desperate attempt to keep possession.
The Buddy Ryan Rule is another example. When he was coaching the Eagles, Buddy Ryan made a travesty of the NFL rules by having his players fake injuries at the end of a half to stop the clock if the Eagles were out of timeouts. It was after this play that the NFL implemented the rule under which a certain amount of time is run off the clock if the clock stops for an offensive penalty or injury at the end of a half.