Randy, my old mailbox as a kid had this problem with people. My dad kept building them stronger and stronger. One day I remember standing outside and watching and old crown vic plow into it and it busted the front all to crap, but he kept driving. Dad chased after him but did not get him ;D That car was fubared! The mailbox was dug atleast 3ft down with poored concrete, made of stone. I would have to say it was a younger, drunken person. Keep an eye out! Good luck! {:shoot}