I don't smoke a lot, though. Just a hit every few hours, enough to give me a buzz. If I get too stoned to do anything, that defeats the purpose for me. Weed is a tool, weed is for work. If I want to just have fun, I'll drink.
It does, however, contribute to psychotic episodes sometimes. But it's never the only contributing factor, it's usually in combination with too much isolation and/or not eating/sleeping properly. If I feel like my thoughts are starting to get more and more unorganized, I generally take that as a sign I need to get out of my apartment and go see my friends. My psychotic episodes are pretty benign, though, all that really happens is my thoughts get too rapid fire and disorganized for me to do anything but sit there in a stupor because I can't get it together enough to execute tasks. They're over when I wake up the next morning. (I will also say, they were pretty frightening before I realized what they were just because it's frightening to feel like you've lost control of your own brain like that.)