Should E-cigarettes be allowed in the office?

The best article I can find is a bit outdated. Is there more progressive thinking in tech on this subject ? http://www.forbes.com/sites/lizryan/2016/02/07/the-truth-about-wasting-time-at-work/#7f73c8571285

My thinking is if someone doesn't have to get up for smoke breaks they could be more productive.