Hussie has drank--we know this because they spent the soul portrait money getting schnockerbottomed on booze at the Olive Garden--but I doubt Hussie has ever done weed or any psychedelic. Neon Ice Cream Headache and all of the weed jokes in Homestuck feel like jokes made by an outsider looking in, and also Hussie is a gay nerd who would probably cry and run to the nearest police officer to voluntarily submit to arrest after smoking even a single weed.