Yes, we need to draw the line somewhere. Personally I draw the line at "are you directly acting on someone else or someone else's property ?". In this case, a

Yes, we need to draw the line somewhere. Personally I draw the line at "are you directly acting on someone else or someone else's property ?". In this case, and in the case of simple substance use, I'd say no, it doesn't cross that line, and there's a decent argument for depenalizing it.