Forty or fifty years ago, people didn't worry about their kids being abducted, etc. because they never heard about such things happening. Today, if a kid is molested in any way, anywhere in the world, it's on every front page and every TV set within hours.
The limited research I've done on this suggests it is true that the level of child disappearance, abuse, murder etc. is not significantly different to historical times and yet - in the UK at least - there is almost mass hysteria about it.
For about the last ten years or so it has reached the point where it is better not to engage children in conversation or play as you are likely to get a suspicious or hostile reaction from their parents.
Oops! Wrong Planet