Some of these posts are just hilarious to me...I believe in freedom of children - to a point. I like Oes's parent's method. That's pretty awesome.
When I was in kindergarten, I actually was allowed to run down the street to play with my friends unsupervised. The difference was, we were way in the middle of no where on a dead end road. All the neighbors watched the neighbor kids (keeping a hidden eye), so we weren't really ever not watched. I was also allowed to play out in our own yard without being supervised. I didn't wander, and and no one ever drove down the road.
When we moved to the other side of town, a more populated area, when I was around 8, I was still allowed to run down the road on my own. Again, it was still a dead end road, and all the neighbors kept an eye out.
Of course, both places you couldn't really see the house from the road anyway. We never lived in a very populated area. We didn't like have people around.
I do think many parents now are way too over protective...I can see the need to "hover" outside because of all the crazy people out there, but kids do still need to learn how to be independent at some point.