Just on general principles, because he's a rotten human being, a cheater and a liar, if I were a pitcher in the Majors, I'd plunk Barry Bonds with a fastball in his plush derriere every time he stepped up to the plate.
Not like Bonds is going to steal 30 bases on bum knees, so he can't hurt you that way, and he never gets the chance to hit the homer that ties Ruth or passes Aaron.
But more than that, it sends a message: we will not allow cheaters and liars to prosper in this game. What do you think this is? democrat (small 'd' intentional) politics where those things are prerequisites for success?
Plus, the big pudgy girlie man continues to wear an elbow protector large enough to do Tony Esposito proud. It's technically illegal, but the Commish allowed him to grandfather it in. If you ever do get to pitch to him- do me this favor. Start like you are intentionally walking him, then label the pig on the fourth. Just to waste his time.