Smoking with Friends

Just ran into this amazing factoid on the latest WNYC Radiolab podcast. Apparently "social isolation" is as risky as smoking for increasing your mortality. Unreal. Maybe however it has more to do with the particulars of the social circle you are in, ie no friends is bad, but maybe your particular friends are just as bad for you as no friends. Especially if you are getting some second hand smoke from them.
Just when I thought that social isolation was a cheap and easy alternative to cigarettes.