When I bought my house 12 years ago I couldn't wait for basketball season to start so I could put out my Duke flag and my Duke mailbox cover. It was the 2005 season and that morning before I left work I put out the aforementioned items. When I came home that day the mailbox cover was torn off my mailbox and ripped to shreds and the flag was laying in the front yard all tattered and torn with the post broken in half.
It was shocking considering I live in "good" neighborhood but as time passed I realized three of the houses below me where UNC fans and they all live/lived right beside each other in my subdivision. After that fact came to light I wasn't surprised at all. The funny thing is they had the balls to do it in broad daylight and "no one saw a thing".
Needless to say if I had caught them I would have stomped a mudhole in their asses and walked it dry.
Anyway...better luck with your Duke flag than I had.....