I don't really want it to be illegal, but as far as I can tell, the same thing that happens to cigarette smokers happens to weed smokers: perspective on the fact that smoking is the atmospheric equivalent of peeing in the pool is lost.
And I wake up like I did last night at 1:30am having had a neighbor opt me into the experience via my open window next to the patio. Yay, personal liberty.
I have zero problem with people choosing it for themselves, but please, figure out a way to keep it personal.