Weed is a interesting topic. It's a natural plant that's been cultivated for a long time for various uses.
I'm not exactly pro or anti-marajuana.
I know there are medicinal uses, recreational uses, industrial uses, etc.
I think the real problem stems from Nancy Regan's war on drugs. While it can sometimes be a gateway drug, only talking heads (and sith) speak in absolutes.
I've had my fair share of chances to partake, which I haven't. I never really had the desire to try. In addition, my curently employment situation does not allow me to consume, but that's not an issue for me.
Anyway, if you do, enjoy. Just don't let it become a problem. Everything in moderation, except moderation, do that all of the time.