We had the same problem. I told the boys to leave my yard. They actually had broken the swingset. I had spent over $400 on it. The next week, someone removed all the bolts from the support for the tent over the playhouse. I "know" it was those boys. It had to be done by someone small enough to fit in the playhouse (or use a ladder) None of those children have come over since. One of the moms even lied and said my sons were mean to her children. Another mom said that I was just being racist. It had nothing to do with race, 3 boys were white, 1 black. It had everything to do with 10 and 12 year old boys kicking my 2 and 4 year old sons off their own swing in their own back yard. I was angry and I feel it is not only my right (my home, my yard, my expensive swingset, ...) but my responsibility to protect my children. One of their children in question pushed my young sons in the pool. They could have drowned! I banned him from my home. Went and personally explained to his guardians why he was banned. This caused some controversy among some moms in our neighborhood. But I am responsible for my children, their saftey is primary. Sure, I don't mind neighbor kids coming over. But I mind when my kids are bullied in their own yard. That is My kids haven, they should feel safe and free to do as they please.