Sheesh!!! I just got mine and I haven't done anything stupid... YET!!!

EDIT: ...wait. I did do a stupid thing. FIRST thing when I brought it home, I let the dogs jump in the back and one goes right to the drivers seat and proceeds to scuff the leather seatback with her claw. Left a nice 3" long mark.
Oh well... not a major deal but, stupid.

...does that count?