The problem is, what goes around comes around and karma is a bitch and all the other clichés. A guy pisses you off so you shop him to his employer so he keys your car so you punch him on the nose so he sticks your DD up your arse and so on and so on.
There is always a guy round the corner who can tango faster and dirtier so I try not to get too excited, especially about words on a screen which has an off button.