Not sure by bt4u's comment is dead, but I've had that exact situation happen to me. Been accused of trying to steal a child while taking my son to the playground. It is an actual thing and it sucks.
This older woman with her 10-ish year old daughter had assumed that I, as a man, had no business being in a family stall. She went to get security to sort me out. Security asked me why I was using the family stall. I opened the door all of the way and pointed at my daughter (we have twin girls who are 4) who was drying her hands. The mom is aghast, "Where's her mother?" I scooped up my daughter and said, "I helped make her, too. Mom's busy. Mind your own business." and went back to my wife.
This is the most egregious example that I have but it's not at all an isolated event. Something in this direction has happened to me well over a dozen times in the last 4 years.
Another strong signal you can find: Many, maybe most, men's restrooms don't have a changing table. I've changed countless diapers while sitting on a toilet with one of my kids in my lap.
When I was in Ireland there were many people against single parents "Lone parents" they call them there, it was a real witch hunt in the media.
So yeah we get these things here but it tends to be localised.
No way this happens in europe. Helicopter americans probably claim there is more child trafficking and kidnapping in europe or something. Yeah, ok. These people watch so many child kidnapping movies and documentaries they don't know which way is up anymore.