i feel for ya. i had the same problem TWICE. went riding and left my rm 250 by my buddies. the next day he took it out and went jumping. when i went to pick it up he thrashed the damn bike, busted the wheel bearings, busted the plastic, bent the rear wheel.
another time i went riding again and let a buddy ride my banshee. i was on the other side of the woods with my bike so i wasnt watching. later that night im checking my banshee out and it had 3 bent wheels, motherfucker!
never again. i wont even let anyone look at it anymore, i keep it under a car cover, lol