Most teenage girls on Facebook and MySpace would ignore messages from a guy calling himself "jadedwasted." That's the nom de Web of Warren Nanney, a guy whom Idaho cops are investigating for allegedly approaching young women for sex on social networks. On Facebook alone, Nanney had "over 500 contacts, 500 people listed as friends and 90 percent of them were under the age of 18," according to local police. Nanney was also allegedly cruising MyYearbook.com, a site the investigators say they'd never heard of before. (It's one of Barry Diller's favorites.)A+ to Facebook for brand recognition? But it wasn't the profiles or messages that took down Nanney — it was after one 17-year-old woman who did meet with Nanney called the cops, fearing for her safety. As much as law enforcement relies on the open surveillance they can engage in online, it's still the girls themselves who best know when to sic the cops on a creep.

"I think that people will realize that user-generated content doesn't have to be like, bad." — 17-year-old entrepreneur Catherine Cook, of MyYearbook.com. [News.com]