JACKSONVILLE, Fla. -- From teens running away, to sexual predators on the prowl, most people have heard of some of the dangers that have been linked to popular networking Web site MySpace.

While some youngsters might think they're not posting much personal information, Channel 4 reporter Laura Mazzeo learned a startling reality -- it doesn't take much to learn who is behind the profile and where to find that person.

In October, what started as an exchange of words on MySpace led to a 15-year-old Polk County girl's kidnapped by William Joseph Mitchell, a sexual predator she met on MySpace.

"She had no idea the kind of individual she was involved with -- she just thought she was a kid in love with an older guy," Polk County Sheriff Grady Judd said after the teen was found safe.

The 15-year-old's situation was a scary reminder of the dangers of sharing too much information online.

Mazzeo spent just a few hours looking at Web pages open to anyone on MySpace. She reported all she needed was a full name and a hometown to find some local teens.

The first Jacksonville teen whose address Mazzeo was able to discover on MySpace actually opened the front door of her home when the reporter knocked.

The 15-year-old girl pictured on MySpace said her parents were not home.

However, that teen was not the only one who posted information that could lead a stranger to her home.

Mazzeo went from online to the front door of another teen, Ashley, without much effort.

"Hi, how are you? I'm with Channel 4 news. Does Ashley live here?" Mazzeo asked the teen's dad when he answered the door. "From the information on her MySpace we were able to make it here."

"Wow. Absolutely -- wow," Ashley's father said.

Ashley, 16, said she couldn't believe someone would was able come to her door after seeing her MySpace page.

"I'm just shocked. All I have are my first and last name and where I go to school," Ashley said.

Ashley's dad said he was equally stunned because he had warned his daughter about the dangers.

"I was shocked. Not surprised but I was shocked that after all the conversations we've had about how sensitive information can lead to something like this," he said.

For Ashley and two other teens Channel 4's investigation was an eye-opener. All said from now on they would be more careful online.

The teens learned that the people looking at their information might not always be friends.

"I'm going to take away where I go to school and my age and my last name, definitely," Ashley said.

Parents are urged to check their children's MySpace or any other Web pages, and pay special attention to whether their first and last name, school, phone number, or date of birth are posted.