Lecherous congressmen are only one species of scary predator. Then there's this expose by Ken Wooden, who wanted to test how easily otherwise smart college students -- Ivy Leaguers and criminal justice majors among them -- could be lured into a total stranger's van. Answer: Very easily. One guy even let himself be tied up with duct tape inside the van. See the exposé on the CBS Early Show here. And then go out and read Gavin de Becker's "The Gift of Fear."