Really? We've seen some dramatic rule changes over the years, offside, back passes, substitutes and substitutions. The only thing that hasn't evolved with the game and the rules is the punishment refs can use on the pitch.
Players surround referee's already, why would it be any different? Why...
Sin bin. 10 mins off the pitch for denying a goal scoring opportunity resulting in a penalty. Football has too few methods of punishment. Telling off - yellow card - red card: just aren't enough for the modern game.