Late reply, but I agree. Amazing analogy, by the way. ;)
The way I see it, it's like sex. People who are taught "abstinance only" and are told nothing about protection and stuff are way more likely to have sex anyway and get pregnant/an STI then people who are actually taught about sex and protection and stuff.
Basically, kids shouldn't just be told to straight out not do social stuff online, cause the way we live now, *everyone* does and they will anyway. They should just be told to be cautious and not give out too much info.
When I was 12 years old, I told myself that I'd never sign up for myspace. A year later, what happened? I signed up, and now I'm also active on two other social networking sites.
I also think that it should be up to the user's discretion as to what info they put online. I have my name, age, city, and picture on myspace, as well as my school in my about me. I have friends who I've never met personally, but it's still up there.
Personally, I don't see the big deal about myspace. I've never run into problems on it. Not saying that I never will, but I feel safe, despite having that info on there. My school has cops all over the place, and they check you constantly for ID if you're inside the building. I doubt I'll be taken away, and my city is pretty big. I feel fine.