I'm an eclectic pagan and a solitary witch. I use marijuana in some rituals; sometimes for meditation, and sometimes as an offering to the gods and other unseen entities. I know several witches who use marijuana, and several more who think it is ok if used judiciously. It has been my experience that many covens will publicly shun its use because of its legal status, even though some members of said coven partake of the herb. It is personal and varies just like everything else in life.