ps .. & doing the low key way id get real no trespassing sign to hang on it too simply because its more official you mean business & once you post a no trespassing sign if you catch anyone trespassing you can call the police & let them take care of it.. all it take will be kid being caught by the police to keep all the kids away for good id think ... & most adults know better then to see a no trespass sign then disreguard it and do it anyway at least i dont think they would anyway..