I'm pretty sure this has been done multiple times on Zelaron, but I'll respond anyway.

I personally don't care either way, but I dislike people who are stoned just as much as I hate people that are drunk. It would have to be implemented just like alcohol currently is regarding smoking in public/etc, because there are people who simply don't want anything to do with it.

As long as it carries the same penalties as alcohol, I wouldn't really care. I'm pretty much in agreeance with Mj.