Believe it or not, I've never smoked pot. Not that I'm against pot, or anything, but I'm just not the kind of person who likes to have fun by ingesting chemicals. I don't drink very much, if ever at all either.
I have my sympathies with people who want to legalize pot for medical purposes, and my suspicions about people who want to legalize pot for recreational purposes.... I'm not sure I'd vote for legalization for recreational purposes, but if it passed, I wouldn't be terribly upset over it. Heck, I wouldn't be upset at all, I just might go and buy a legal joint and join in the party that would inevitably follow.
But, I think people who advocate legalization for recreational purposes have a steep up-hill climb to face. One of the biggest hurdles is an appearance of legitimacy. Some may have some very good legitimate arguments for recreational legalization, (I'm not convinced though...) but the movement's face isn't a very good one.
Take a look at these pictures. These aren't exactly representative of the movement, but this is what many people think of when people think of legalization. In particular, look at pictures 3 and 7.
Picture 3 shows a clearly underage kid using a bong. Not exactly a responsible face to present, although I'm sure nobody was objecting to this around them. Encouraging children to smoke pot, or to do any kind of recreational drug, I think is rather irresponsible. And before supporters ask, Yes, I would say that to caffeine as well. Utilizing a drug for recreational purposes needs to have a stronger justification than its fun, in the same way as driving a Hummer is fun. Sure, there isn't likely going to be catastrophic effects from one person driving a hummer around for fun, but it begins to foster a kind of character that I'm not sure many, if anyone would call intrinsically valuable. What kind of character does it foster exactly? Look at Picture 7.
Picture 7 shows a pregnant woman at a 4/20 event. Now, it doesn't show her smoking, but second hand smoke can have adverse effects on the health of a fetus, be it tobacco or pot. I think it shows a kind of reckless disregard of consequences, in favor of the momentary pleasure. Basically, a hedonistic lifestyle.
Again, I'm not strongly against legalization for recreational use, but I think at the very least it needs a better face.