I can assure you that the mainstreamness of drugs these days would probably boggle your mind. I know, maybe 3 or 4 people my age that dont use any drug at all (scratch that, they all smoke and drink). Its almost normal these days.
No wait, 1 of my best friends doesnt take anything, and she just applied for the air force. Her drug free lifestyle and high TEE scores will prove most useful I'm sure. I got her into it when we had some bring-a-friend thing happening at air force cadets