Sometimes you have to use some common sense.
I had a game that had 2 players throw punches at each other. Both dismissed for VC. I binned the away player first as he was the most aggressive and before he left the FOP, he turned to the home player and said "When you get into the changing room, I'm going to f***ing kill you, you little c**t"
Bearing in mind the home player was in his kit, his car keys were in the changing room, I decided to have him stand 15 yards away on the other side of the pitch for the remaining 15 minutes of the game, with the clear warning that if I heard a single peep from him, he could take his chances in the changing rooms.
As it was, 5 minutes later, the aggressive away player came sprinting out of the changing room, straight across the FOP in an attempt to get to the home player, stood causing no trouble by himself.
Technically, I was incorrect to do this, but its a decision that I would take again, given the circumstances.