The idea started on Reddit’s r/trees, a community for cannabis users. In July 2018, user RedArms219 posted a picture of a paper bag full of trash in a park. They titled it “Cleaned up the smoke spot #StonerCleanUpInitiative”:
Within about 24 hours, the post had 22,000 upvotes. Based on anecdotal data, that could mean anywhere from 80 to 500,000 total views.