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Are Facebookers having a hard time keeping their pervy hands off user profiles? Over the weekend, we learned that Facebook employees take full stalkerish advantage of their ability to peruse member profiles. Now a tipster writes in claiming that a Facebook product manager actually looked up a user's password, logged into her account, and changed her profile picture to a graphic image. Here's the back story.

Our tipster tells us "the employee got the password and then met up with his friend who was mad at the girl because she turned down his offer to take her to his prom."

Now, before you judge, remember that you, too, were once an angsty, hormone-riddled youngster like the kind employed in droves at Facebook. Of course, you didn't have access to 50 million user profiles. Or $240 million in cash from Microsoft to flush down the toilet. Just tissues and a lot of illegally downloaded emo music.

Truth be told, I'm a little skeptical of our tipster's tale on one count. Facebook employees are young, but do they still have friends going to proms?

But here's the problem for Facebook. After learning that at least some Facebook employees do chart the social graph for their own pleasure, it will be hard for Facebook users to believe any of the company's assurances. A good place to start restoring trust? A thorough revision of Facebook's privacy policy, which, as best I can tell, only guarantees against third-party disclosures, not employee misuse.

And then there ought to be some very noisy firings of employees who break the rules. Facebook is hiring another 400 people through the end of next year. It won't be hard to add a few extra to replace the rulebreakers.