When it's getting to the point where you don't just have to go outside, which is reasonable, or even go outside but avoid high traffic areas, but instead to go to this one specific spot outside, and there are people advocating banning smoking outdoors altogether it starts to get ridiculous.
I find it a strange comparison to the marijuana legalization movement.
EDIT: correction: they have actually banned smoking outside in certain places. (http://www.cnn.com/2011/US/05/23/new.york.smoking.ban/) So you can't smoke indoors. You can't smoke outdoors. But fuck 'em, they're smokers, so who cares.