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 exposÃ© on the CBS Early Show here. And then go out and read Gavin de Becker's "The Gift of Fear."