It's stupid on his part to rant and rave and talk about sitting out playoff games. That's unprofessional, and it's no surprise since Kmart is one of the biggest thugs in the game.
That being said, I'd probably be irritated if somebody went into my private locker, stole my keys, and caused thousands of dollars of damage to my car, too. I just don't think it's all that funny to destroy somebody's stuff.