I think this is highly dependent on the parents. I'm 32 and my parents let me go all over town, pretty much where I wanted with no adult supervision, for as lon

I think this is highly dependent on the parents. I'm 32 and my parents let me go all over town, pretty much where I wanted with no adult supervision, for as long as I wanted. I was allowed to stay out past dark until about 9 on school nights, later on the weekends and in the summer. All this and I have a medical condition that could get me seriously hurt or killed. My parents trusted me, and they taught me early on to be responsible. That said, I regularly see young kids in SF out by themselves. I'd say as a parent, if you are one, get ahold of yourself and allow your kids some freedom.