Like the author pointed out, millions of Americans take legal amphetamines every year. I'd wager a bet that legal users of amphetamines outnumber the illegal users 10,000 to 1. Besides, amphetamine is just the name of the compound, it doesn't suggest anything. If you imply that simply knowing that amphetamines can keep you awake is dangerous, then I'd like to point you towards centuries of proof that not telling people about sex totally stops them from having it.