Guy needs to let go of that bong. My kids teach skiing with dozens of ski and snowboard instructors in their teens and 20s. They tell me you can always tell which ones are on weed—they tend to be sloppy, aimless, and mentally slow on the uptake. What's really sad, they say, is when you can see the same kid—a teenager—seem to "shrink" psychologically and physically from year to year, instead of growing bigger and brighter.
My observation of my fellow Baby Boomers was similar. Habitual users I knew seemed to lose focus and self-discipline. A lot of narcissism and depression, with bad effects on work and marriage. There's probably some self-selection going on here, too—with people inclined to those problems more attracted to getting high.
If you can tell (or smell), then those are the idiot smokers.
Many intelligent, very successful people consume it and you would never guess. They typically vaporize it so there is no lung damage or lingering smell. A seasoned smoker will also usually not have the typical red eyes.
It's no different than a glass of wine or beer after work. Obviously SOME people get carried away but we shouldn't restrict freedom for all because of some idiots.