Many seniors have finally sent off the last of their applications, but for underclassmen the flurry of mail is just starting. They receive fistfuls of glossy brochures showing the same happy and diverse group of clean-cut students on the grass under an autumn sky, extolling the virtues of this or that college in strikingly similar terms. Sometimes the brochure is even accompanied by a letter, “personally” addressed to the student, “congratulating” him on his “accomplishment