I was in a park about two months ago with my family near a lake when I saw, down nearer the shore, two young lads apparently skimming stones on the water. I wasnt taking too much notice as had my two children with me and was keeping my eye on them and we were a bit away from the shore. There were lots of other people about, men, women other children. After a while I noticed that the young guys were kind of pretending to be skimming stones but were aiming them at the ducks. They were being subtle about it at first but started becoming more obvious. First of all I wasn't sure they were doing it, then I thought someone else will stop them. There were lots more people nearer and unaccompanied with children as I was. Finally I felt no one else was going to intervene so I went down to them and yelled at them to stop. I asked them for their names and told them I was going to tell their parents/school/guards. They were only young kids and were shocked and frightened. I thought one of them was going to cry. I told them what they were doing was terrible and I was ashamed to see someone doing that to helpless birds. Then when I thought I had frightened them enough I told them I'd give them one chance but if I ever saw them do anything like that again I'd be straight on to their parents etc. They scarpered and the whole park had been watching and no one met my eyes. I hated doing it in front of my own very young children and I hated being made to do it cause no one else would. But, hey, maybe I should be grateful I wasnt arrested!