Tina Walker was wary of the cyber-world of MySpace and its 70 million users. People are not always who they say they are.

Tina knew firsthand. Megan and the girl down the block, the former friend, once had created a fake MySpace account, using the photo of a good-looking girl as a way to talk to boys online, Tina says. When Tina found out, she ended Megan's access.

MySpace has rules. A lot of them. There are nine pages of terms and conditions. The long list of prohibited content includes sexual material. And users must be at least 14.

"Are you joking?" Tina asks. "There are fifth-grade girls who have MySpace accounts."

As for sexual content, Tina says, most parents have no clue how much there is. And Megan wasn't 14 when she opened her account. To join, you are asked your age but there is no check. The accounts are free.

As Megan's 14th birthday approached, she pleaded for her mom to give her another chance on MySpace, and Tina relented.

She told Megan she would be all over this account, monitoring it. Megan didn't always make good choices because of her ADD, Tina says. And this time, Megan's page would be set to private and only Mom and Dad would have the password.