This reminds me of a funny and (unfortunately) true story. Even though it's second hand, I have no reason to believe my friend would be pulling my leg or exaggerating that badly.
Here's what happened: my friend (we'll call him Mark) was at this big fair one time, waiting for his GF to get back from the toilet. He notices a kid hardly older than 5 wondering on his own and goes over to ask if everything's alright. Now, Mark may seem a little intimidating, being quite big and usually dressed in black, but he's a sweet guy. Not that the child would know.
So Mark asks if the kid's lost and he says "Kinda". Then Mark asks if the kid's been staying put but obviously he hasn't. He refused to tell his last name or to come with Mark to the information desk so they could call the parents over the loudspeaker...thingys. Understandable, the kid was obviously told not to talk to strangers.
So Mark does the next thing that comes to mind: hoists the kid up on his shoulders and asks if he can see his parents in the crowd. Mark is straightforward like that

When that didn't help, he lifted the kid even higher, holding him up by the armpits like Simba in Lion King (man I wish I'd been there), and hollers "WHO HAS LOST THEIR SON" or something like that.
Good news: the kid's mother turned up soon after that. Bad news: she came with a security guard, tried to have Mark arrested and implied more than once he was a pedo. Mark's girlfriend got back to see this mess and THAT seemed to convince the guard there was no attempted kidnapping going on. Go figure.
Now, I understand the mother was upset but would a pedo really act like Mark if he found a lost child in a crowd? Idiots.