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I expect its the same ones that go around throwing stones at each other, and then the stones rebound off the cars, they were reported to the police about it, my lad chased them, and tried to keep them cornered until the police arrived, but you cant keep someone covered for over an hour, then when they do arrive, and come to check with you, then tell you off for giving chase, you must leave it all to them, we told them where they came from, but I dont think they ever went to the placeo confront them, but will keep an eye on them