Yeah, blogging, that's what you should be worried about...
Here's an MSNBC article about parents who freak out when they find out their kid has a blog or is a member of MySpace. Um, in order to use these sites, I'm guessing the kid is spending a bunch of time in front of a computer, safe at home.

Since I write for teens and young girls, I like to read the blogs they write. I've never seen one entry that seemed dangerous, and I've never seen anyone post contact information beyond an email address or IM name. My impression is that young people who are busy composing a hilarious rant about a bad day, posting photos of themselves and their friends, or making silly videos to put online, are not going to feel the need to turn to drugs or violence to make their lives interesting. I wish someone could shake some sense into these parents, so they'd support their children's creative projects instead of shutting them down.