I've not used an online dating site, but I've heard a lot of people lie on them, males and females. Some say it is so that if you don't look good, you won't recognize him/her, and he/she can sneak away. But I seriously don't get it, because once the person meets you, they'll know what you look like. If you lied, they may reject you right away, because that's no way to start a relationship.

As for social networking sites, I see people giving away sensitive information all the time. Teens probably do it most, but I see A LOT of adults who do it, too. They post the school they go to, where they work, places they're going (or sometimes a friend will comment something like, "See you at Such-n-Such tonight!"), etc., which makes it easier to find them. I was looking for a friend on MySpace yesterday, and one of the search results that came up told me of a girl who works at a local grocery store (she named it), and she posted her photo. That makes her really easy to find.

Sometimes I think of messaging people that do that, but I think it would backfire. People would probably tell me to f*** off or tell me they don't really think it's a big deal.

A lot of teen girls post cheerleading photos from school (or their friends might post photos of events that included them), and that can help someone intent on harming one of them know what school they attend, and know that they're on a team that might stay late at school for practice, etc.