hmmm...
I personally have done both. I didn't like weed. I didn't get stoned...but I got high and was pretty hyper for a while. Pretty much the same thing from a sugar/caffeine high.
Drinking from what I've seen can destroy lives. Both physically and mentally. My dad for instance, he's a pretty nice guy when he's had a few in him...but if he just gets home from a long day at the office and hans't had time to relax yet, he doesn't wanna say ANYTHING. Plus he has this really gross looking beer-gut. If he didn't have that, I'd say he'd look ten years younger.
However, I've seen the effects of weed on people too. At the Hardee's I worked at when I was a kid...there were at least 3 potheads I worked with that didn't graduate from high school, and came to work constantly high. It was sorta depressing.
Overall I think Ashley's right...it comes down to being the lesser of two evils. However, I think weed is the greater evil, IMO.