This is total BS. I've smoked pot since i was 16. I am now 54, hold an extremely responsible job at a major manufacturing facility, making a nice salary, and have never had the effects of pot carry over to affect my job performance. I do not and never had smoked pot on the job. Never. Now on the other hand, the carry-over effects of alcohol at times have severely affected my job performance. I am respected; I've stopped smoking to take drug tests and nobody has ever insinuated I am a "doper."