i'm assuming you're talking about the Australian Kevin Muscat right? I haven't seen that much of him, but the World Cup Qualifier against Uruguay alone was enough to show the world how much of a dirty player he is
Just look at Nistelrooy. For example against man utd. He does many mean things. Nasty stuff when the referee isnt watching.
And C.Ronaldo can get crazy sometimes. BadBoy = Hot blooded person who can't control himself when things dont go right and take it out on a person or just dont obey the coach and run out of trainings etc. hard controlled players too or spit on players or players who are just making idiotic things without a reason..
It depends what kind of payback you intend to inflict I guess. If it involves willingly break a player's leg as Nasty Keano admitted in his biography then that qualifies you as a first class bad boy, to put it mildly