Good post all around, but wanted to single out this part because it's something I hear constantly, from the pro-pot side.
Why is it that in real-world examples, everyone who smokes pot does so moderately, and everyone who drinks is a raging alcoholic? You CAN drink in total moderation, many of us do. The last 8 times I had an alcoholic beverage, only 2 of those times did I have more than 4 and have a slight hangover. The other 6, were 1-3 drinks out with some friends, and had a buzz for maybe an hour. No hangover, no puking, didn't affect my day at all, at least anymore than a bong hit would.
Not everyone ties one on every time they drink. That'd be like someone saying everyone whop smokes doesn't leave their couch and walks around in a fog all day.
People need to realize that weed and drinking aren't just different in effects, but different in how it's consumed, how often it's consumed, the stigma's of both, etc. They are quite different when you boil it down.
And man-made piss? I think we can all agree that there are alcoholic drinks out there which are infinitely better than inhaling smoke.
FWIW I smoked daily from 2006 until 2012