How about the refs just enforce the rules that are already in place. For instance:
Embellishment - how many times does a player get fouled but then jump in the air, scream and roll around in pain just to get up and sprint away. The embellishment rule in HS was supposed to fix that with a yellow card.
Here is another idea.
A second yellow/red is an automatic one game suspension and the team must play down a man. Why can a player get 2 yellows for horrible tackle and not get suspended (and their team doesn't play shorthanded), but if you kick the ground and let out a cuss word it is a straight red and 2 games???? Bad tackles are more of an issue than cussing.