Overexposed:

Krystal Rodriguez, 17, a senior at Clark High School, has experienced the dangerous effects of privacy mixed with social media.

Out of boredom, Rodriguez and a friend logged into MySpace and met a couple of guys online.

Rodriguez, then 14, posted her phone number on MySpace and added the two strangers as "friends," thinking nothing would come of it.

"… We spent hours and hours and hours just commenting back and forth, and finally, they were like ‘OK, so can we have your number?'" Rodriguez said. "We were little so we were like ‘Sure, guys want to talk to us! Cool!'"

They had no idea they were flirting with disaster.

Many teens see privacy as a necessity, yet post phone numbers, addresses, pictures and other identifying information in MySpace and Facebook profiles. In doing so, teens like Rodriguez are sacrificing privacy for enhanced social interaction.

Teens may not realize that more than 513 million Facebook and MySpace users can get access to their profiles — whether it be through accepting a stranger's friend request, hacking or posting personal information.

Intrigued by the guys' photos, the girls didn't inquire about personal information.

"We didn't really know much about them," Rodriguez said. "We hadn't asked them where they were from, we didn't ask them how old they were, we didn't (ask) anything.

Rodriguez hadn't considered her loss of privacy in the long run. She didn't think she had anything to worry about. Being stalked wasn't a consideration.

"They actually came (to San Antonio) while we had been talking," Rodriguez said.

The boys wanted to meet the girls while they were in town. Rodriguez and her friend said that was a bad idea. The guys pressured them, but they resisted.

Eventually, their communication waned.

"We stopped calling them and texting them. It got to the point where they were calling my house phone," Rodriguez said.

They stopped calling Rodriguez's friend after a week but harassed Rodriguez for two more weeks.

"They were calling my house at two, three o'clock in the morning," Rodriguez said.

Aware that she would get in trouble for late night calls, she didn't tell her parents, especially because the boys were strangers.

"I constantly had to have both phones (in my room) over and over again, pressing the end button … They kept calling and calling and calling," Rodriguez said. "I'd answer and I'd tell them ‘I don't want anything to do with you. If you don't stop, I'm gonna tell my mom.'"

The fear and stress brought Rodriguez to tears. She told her brother, hoping that he could help. He advised her to tell their mother, but she refused.

The guys started sending Rodriguez disturbing "stalker-like" messages through MySpace, such as "I will find you" and "you will be with me."

One of the stalkers told her that if she wouldn't be with him, he would find and hurt her.

Rodriguez, unsure of the boys' intentions, told her mother.

"Not knowing about these kids — how they were or what their intentions were was scary," said Norma Manrique, Rodriguez's mother. "I was worried that something could happen to her or to her friend."

Manrique answered the next time the stalkers called.

"She told them that she knew everything and if they didn't stop calling, she was gonna call the police," Rodriguez said.

The stalkers called a few more times, but that wasn't the end.

"Two years ago, I got a phone call from them at the house. They still had my phone number," Rodriguez said.

When they identified themselves, she yelled for her mother. They hung up and haven't called since.

"When I had put my number on there, I didn't really think about privacy," Rodriguez said.

"You don't really think about it until you have something happen to you."

Rodriguez believes that teens overexpose themselves through social media.

"You see little girls … with half-naked pictures and their phone number. I've seen one person with their address on there," Rodriguez said.

Christy Matte, author of "The Teen Guide to MySpace and Online Safety" offers tips for teens involved with social media.

"Never post suggestive pictures or information on your profile. If you wouldn't show it to your parents or grandparents, it's not OK to put it online. You may think it's just for fun, but other people might get the wrong idea."

In "Facebook, MySpace Confront Privacy Loophole," authors Emily Steel and Jessica E. Vascellaro report that "Facebook, MySpace and several other social-networking sites have been sending data to advertising companies that could be used to find consumers' names and other personal details, despite promises they don't share such information without consent."

Many privacy rights groups like the Electronic Privacy Information Center are constantly at work trying to preserve social media users' privacy.

EPIC is urging Congress to extend the Children's Privacy Law to teens and social network services.

EPIC President Marc Rotenberg said the Children's Online Privacy Protection Act of 1998 "did not anticipate the immersive online experience that a social network service would provide or the extensive data collection of both the trivial and the intimate information that children would share with friends."

EPIC recently joined seven other privacy rights groups in sending a letter to Facebook CEO Mark Zuckerberg to urge his social networking site "demonstrate its commitment to user privacy."

The letter suggests changes such as not allowing application manufacturers to access users' data when their friends use the apps, not retaining data about visitors to third-party websites that contain "social plug-ins" and giving users control of all information they share through Facebook.