This character should be folded, mutilated, spindled, erased, shot, stabbed, strangled, poisoned and hit with a phaser set to "deep fat fry." Not only is this character offensive in its own right, it is blasphemous. Anyone who remembers the day-to-day genius of Bill Watterson's masterful comic strip ought to be deeply offended by every mouth-breather of a moron who has a "pissing Calvin" on his truck.
In a just world, it should be legal to throw a brick through the window of every vehicle that has a "pissing Calvin" on a window. If no bricks are handy, Molotov Cocktails should be permitted as viable alternatives.
Now this, this is genius at work: