"at most, your landlord will need to get rid of the smell for the next non-smoking tenant"
And while you're there, will need to find a way to get rid of the smell for everyone in a 500 feet radius (im exaggerating, of course).
While I'm absolutely ok with it being legal, and it certainly should not be a criminal offense...it at least should follow rules similar to tobacco with a twist. That shit can seriously ruin the day of everyone living around. Entire city parks are becoming impossible to go through unless you're looking for a contact high.
So it definitely does not deserve to be a crazy SWAT team involved criminal offense, but victimless, not quite.