I don't think it should be illegal, and i think the war on drugs is a big sham.
That being said, I am MUCH better off not smoking it. It does horrible things to my mind. I avoid it. Once in a while I will take a toke just to remind myself of how seriously I should avoid it, and it acts on me like a scary hallucinogen....and I very certainly act more "autistic".
I guess this is an atypical reaction. I always thought it was my AS-ish-ness that made for my inability to smoke pot without such adverse effects, but on forums like this, I have found that a lot of Aspies love smoking pot. For me, it is the road to insanity, unfortunately.
My very AS-ish friend is completely dependent on it. He is one of a handful of people I know who are awful to be around when they do not have marijuana. He is also a pretty heavy drinker. He copes with his AS-issues by constantly keeping the edges blurred with beer and pot. He takes them like essential medicine. He always has to have some kind of buzz going on to feel comfortable...Otherwise, he would be a very awkward and high strung person, laden with severe sensory issues. On one hand, it works for him. It helps him feel closer to "normal"...and he acts it too. On the other hand...his habit is so persistent that there is no room to develop other coping mechanisms...But I guess the same could be said of various pharmaceuticals that people might take to help them deal with their issues.
He counteracts some of the potential negative side effects of his use with an obsessively healthy diet.
He admits to it's adverse effects on his short-term-memory.
Smoking as much as he does may lower his ambition to some extent..but perhaps not when considering what an ordeal it can be for him just to cope with day-to day existence...He does have somewhat severe issues.
I don't think it makes him a dull person. It helps him enjoy life and not be so sensitive to every little thing.