We took our 1 year old to a marine lake, and there's a small paddling pool next to it. We took her socks off & she was paddling in the water. There were 2 small boys running around naked. As I was holding my daughter I noticed an old guy, in his 70s arrive alone & sat down. His head must have been on a swivel, as he was following the boys movement intently. My wife was about to get our daughter undressed, but I picked her up & turned away. I whispered about the guy to her.
At that point he got up & as he walked away, he stopped as if to talk to another couple, but they just blanked him.
My wife says he was probably just a harmless old chap, and they don't always think what they're doing.
I suspect he was watching children deliberately. AIBU to suspect this given his behaviour? I was going to go over & ask "Are you here with anyone?", Would that be the best way to handle it? It's all a bit new to us.