Sorry, Eric, but if you want an aviation career, marijuana is the worst thing ever ... so is alcohol, ecstasy, cocaine, and everything else out there. You've got to be as clean and pure as the wind-driven snow if you want to make it in this business. Yes, that does mean excusing oneself if your friends are going to light up.
I got called a "dork" a lot in college, but I stayed far away from drugs of all kinds. Guys would smoke pot in my dorm, I'd go hang out in the library or computer lab instead. That's why, on random drug test day at Riddle, I could have cared less, and guys I knew were mixing Clorox in their ice water and other dubious (and dangerous) concoctions in an attempt to fool the drug test.
I don't care what your opinion is on the dangers (or absence thereof) of marijuana, but if you want a career in aviation, DON'T even THINK about it. I don't even eat poppy seeds for this reason! A positive test will follow you for eternity, and is the kiss of death to your career.
Having never tried it, I don't know how good the high can be. But even if it is ten times better than sex (something I doubt) ... IT IS STILL NOT WORTH IT. ONE JOINT CAN RUIN YOUR CAREER FOREVER. Don't even think about it. Don't even think about it. Stay away, stay away, stay away. I can't say it strongly enough, stay the hell away from any and all drugs of all kinds. If you want to smoke pot, then consider a career in burger-flipping, because that's where you'll wind up if a random test pops up at the wrong time. IT IS JUST NOT WORTH IT.
Sorry for the lecture, but this is a topic I feel VERY strongly about. As Hayden Fox would say, "Bury it. Bury it with a shovel and then bury the shovel." Flush it down the toilet, throw it in the river, get rid of it forever.
FL270