THIS is America’s college town par excellence. Kids from all over the world flock to Boston to learn. I have a son who is a freshman here. Last autumn, as he entered school, I listened to warnings about the dangers of binge drinking. I think they missed the point. The real epidemic involves so-called smart drugs, particularly Adderall, an amphetamine prescribed for attention deficit hyperactivity disorder (A.D.H.D.) but so freely available as to be the pill to take whenever academic pressure requires pulling an all-nighter with zero procrastination to get a paper done.