No, if they all ended like this there would be a story like this in the papers every week.
I admit I have a memory like a goldfish but there aren't that many in recent times I can remember, the soham girls, Sarah Payne. Madeleine McCann probably wouldn't count as not in the uk. Jamie bulger. They're the recent ones I can remember off the top of my head.
I can remember similar numbers of cases from when I was a kid in the 80s. I can't remember names as I was young but I do remember eating tea and watching the news and hearing stories. There was a girl who was sent to the corner shop for bread and never came back, a girl who was taken from a tent in her back garden, a papergirl where her bike was found in the lane with the wheel still spinning but no sign of her.
These things did happen when I was a kid in the 70s and 80s, my dh is older than me and remembers the kids going missing who turned out to have been taken by Ian Brady and Myra Hyndley.