Raining on Their Parade

To me, that pretty much sums up the soul of the game.  You squash your opponent's initiative by moving rusty old cars in their path, and throw large rocks at them when they least suspect it.  You pull rugs out from under them.  You put sand on their floors.  You send them packages of mud for their birthday.  Every day is their birthday.  You ignore them when they threaten you.

You spend your waking hours anticipating your chance to get back in front of your computer just to rain on their parade.  You steal their raincoat to boot.  How is it that such behavior can be so wonderfully, gloriously addictive?