(Woohoo, always glad to meet others who see 24/7 news as overwhelming and probably bad for the human race.)
The problem is that you can't literally watch a child all the time (and I think we're a bit off-topic of pug's original post but here goes). It is far more effective to educate the youth as to the proper way to deal with danger, how to use their sixth sense, to obey strictly your rules, and to make them a more aware individual. That way, if it IS Uncle Chester, they are still an alert, educated individual who can't be fooled.
Also, I wanted to talk about pug's entertainment comment but got too busy yesterday. Pug wrote:
Also its not enough to just raise kids you are supposed to entertain them every second
In your example, I'm not sure the mom who plans playdates weeks in advance is not actually doing herself a favor so that she can schedule a life around her child, rather than what you perceive to be over-mothering.
It wasn't until I got older that I realized that many times my Mom sent me to some camp or music lessons, she may well have been seeking time for herself as well as giving me opportunities she never had. That knife cuts both ways...hehe
Overall I agree with you though. My mom would drop me at the library for the entire day and to this day I can never be bored as long as there is reading material of any kind nearby. Teach a child how to seek out entertainment on their own, and you are doing them a favor for their future.
One last comment, about vicariousness. I think many parents try to live vicariously through their children, and that many activities they schedule are ones they themselves wished they had done (or done well). It would be refreshing for a parent to find out what the child wants and to encourage them wherever that passion lies. Even if the passion is a sedentary video game, I'd get them a little computer building kit, computer mags....make it a broad interest and not just a limited viewpoint of what a hobby involves.