You seem to already be cognizant of the fact that the "angry stoners" you know would also be angry if they were straight. I will add that they might possibly be even angrier when they are straight. Some people just have chip on their shoulder. Some of them take valium, some smoke weed to take the edge off. Counseling might be a better approach, but if weed keeps them from going postal in the meantime, it might not be such a bad thing.
The biggest danger one generally faces when dealing with someone who smokes is getting caught up in a conversation that has no end or apparent direction.
nope. it exacerbates the problem, magnifies even. I figured posting that would attract a lot of "that cant possibly be the case" like i said if you wanna meet them let me know. some of them are the nicest people i know sober.

