Just dropped DS1 at dance class. Outside is a small playground with railings round it and a few children playing on the roundabout. There is a man standing outside the railings filming them. I couldn't see him brilliantly because I was in the driving seat of the car and had my back to him, but I didn't see him talking or interacting with them at all and they didn't seem to be taking any notice of him. I watched him for a minute and he seemed to be moving away then he came back again. Anyway, I thought it was probably nothing and drove off. I drove round the corner and started to worry that he could be up to no good, so I pulled over and contacted the police on 101. They are going to check it out, but now I am feeling guilty that I could be getting some perfectly innocent father or grandfather just filming his kids into trouble/ embarassment. Should I have approached him myself first and asked what he was doing? Do you think I overreacted?