I guarentee you it is teenagers. We had that problem around halloween, although it was more down the block. School was in session then, I can only imagine how bored these kids get. It makes me mad that these kids are so bored with their own lives they feel the need to ruin your stuff, that you paid for and earned. I was bored all summer, I got a job. They could easily do the same...anyway hope you catch these crooks. And I agree, DON'T risk a confrontation with them, they could have some sort of thing they would use to hurt you. I highly doubt they'd hurt you but it's not worth the risk, they are probably just a bunch of bored cowards.