Drinking in the Forest?

While we were taking our dog, Becka out for a run in the baseball field near our house, we spotted a lot of beer cans in the trees nearby. We went to take a look, and found that people had been drinking there. They left all their trash there, when a trash can is nearby. More than 50 cans were found there, and this is not the first time we picked up cans in that location. We are hoping to find out who is drinking there...
We brought the cans home and recycled them in our bin.