Women are joining Facebook in droves, but Colleen Moss refuses to sign up.
Too risky, says the head of the FBI's North Carolina cybercrimes unit. Too many personal clues, she says, for shady characters to use for identity theft or worse.
"People need to realize that the Internet is not their personal diary," she says. "It is a public domain, and if they don't want people to know things about themselves, they need to keep it to themselves."
She's not the only one worried about privacy on social networks.
The Palo Alto, Calif.-based Facebook faces a growing backlash over its effort to push more details about its nearly 500 million members' lives and habits from the private to the public sphere.