Additionally, there should be a rule enacted to prevent players from harrassing and trying to influence referees eg., putting their hands up to falsely indicate that the opponents had kicked the ball over the lines, had made a "cardable" bad tackles etc.  It is simple to prevent such cheats. 

Enact  a rule which says that if a player chooses to challenge a referee's decision and if the challenge turns out to be wrong after video footage is shown, the player will be penalized;  the penalty will have the said player temporarily taken off the field for 10 minutes, similar to one of the penalty imposed in field hockey games.

This should be done because players are getting increasingly bold to commit such unhealthy actions and make referees look bad.