I had to say something.
Walking across millennium bridge in London yesterday with my DSs and passed a Grandad and his 2.5 - 3YO. boy had one of those backpack/harnesses on, and was lying on the edge of the bridge, actually against the tensile steel cables that form the guard rails (nothing beyond that except a long drop and the Thames). His Grandad was tugging the harness to persuade him to get up, but was also taking pictures of the view and not really looking that bothered. I stopped a few steps down and looked back, and eventually I went back and said I though he should get the little boy to stand up. He refused and said he was fine, but I watched from afar until he eventually got up. I had one of those moments when you imagine what might happen and can't walk by.. I would bet that his mum wouldjn't have let him do that...
This bridge makes me feel tense because the cables are horizontal, and any child could get up and over in a moment, and it would be 'Goodnight Vienna' for certain. I always make my small DCs hold my hands across there...
AIBU?