I don't think non-movie examples need to be here. The title of the page implies that this is a movie trope (THC Theater would include broader examples). Plus, there are already tropes for The Stoner and Stoners Are Funny.

I want to use either one of these as a quote for this page: "It almost seems heretical to see a movie without the aid of marijuana or alcohol when it was clearly conceived and written by the super-baked." "Stoner movies and sobriety are a terrible combination." -Nathan Rubin, AV Club