I smoke every day medically as it helps with managing the daily nausea, vomiting, and cramping pain that my IBS presents me. I am very young for most software engineers in my field, and I work at a startup that was recently funded. Before I started smoking daily, I was missing loads of work because of pain. Now, I wake up early every morning to smoke so that I can actually function. Marijuana has not improved my skills as a hacker, but it has enabled me to spend more of my life doing what I'd like to be (programming) instead of dealing with a disease. I can vouch for the therapeutic effects of the drug too, and I know that for some people it is what they need to get things done. In moderate amounts, I don't know how it is fair to say that drugs like Prozac and Riddlin are acceptable for the workplace any more than pot.