Chicago E-Cigarette Ban: Major City Adds E-Cigs To Public Smoking Ban

http://www.huffingtonpost.com/2014/01/15/chicago-e-cigarette-indoor-smoking_n_4602702.html

I thought that previous smoking bans had to do with second hand smoke and protecting the health of workers. I'm not so sure that it is a good idea to ban e-cigs to prevent more people from taking up smoking.