I agree with you, man. Among my friends, we call it it's names: Mary Jane, pot, "Wudz" my personal name for it =).

But among peers who are on the fence with the issue, I strictly use the term marijuana, herb, and cannabis. It's important how you portray yourself sensible, open-minded, and well-educated when you talk about marijuana; you're representing it and yourself at the same time. Politicians won't move their asses on the issue, so the "word" has to go by word of mouth between us citizens for anything to get done.