Trouble at the park?

We drove to the park today, feel a bit guilty it only a 2 min walk (15 min to this bit though). Got there and there was a gang of youths throwing balls around the like play area. Got a little concerned as I approached. But they were just enjoying themselves and where very polite, considerate to me and my girls, felt a bit of an arse to it entering my head, saying that I have had abuse heard at me at the same park.