Dressed in sneakers and jeans, they hang out along the edges of campuses, handing out fliers and calling out to passing college students. Each group, students say, has a different, seemingly harmless opening line: ''Are you saved? Are you antiwar? Are you stressed out?" But some college officials say they view most of these groups as high-pressure organizations akin to cults. The groups have a history of recruiting vulnerable students and then alienating them from their parents and classmates. They say that the groups, many of which were banned from schools more than a decade ago, resurfaced on campuses this...