The paranoia is counterproductive, it actually makes the world more dangerous. Ten or fifteen years ago this story made the rounds in Britain (writing from memory, can't be bothered to search for it in the BBC archive):

A small boy had wandered off and was found dead in a pond, he had fallen in and drowned because he could not swim. It turned out that the child had been seen by a labourer cleaning a ditch, but he had no cellphone and did not intervene because he feared the pedophile hysteria and did not want to be seen with a child that wasn't his.

It's understandable if you remember what Rupert Murdoch's Sun was like.