When I worked at RTI International, I worked on an exploratory analysis of Twitter discussion of electronic cigarettes. A paper on our work was just published in the Journal of Internet Medical Research: Using Twitter Data to Gain Insights into E-cigarette Marketing and Locations of Use: An Infoveillance Study.¹

Marketing and use of electronic cigarettes (e-cigarettes) and other electronic nicotine delivery devices have increased exponentially in recent years fueled, in part, by marketing and word-of-mouth communications via social media platforms, such as Twitter. … We identified approximately 1.7 million tweets about e-cigarettes between 2008 and 2013, with the majority of these tweets being advertising (93.43%, 1,559,⁵⁰⁸⁄₁,669,123). Tweets about e-cigarettes increased more than tenfold between 2009 and 2010, suggesting a rapid increase in the popularity of e-cigarettes and marketing efforts. The Twitter handles tweeting most frequently about e-cigarettes were a mixture of e-cigarette brands, affiliate marketers, and resellers of e-cigarette products. Of the 471 e-cigarette tweets mentioning a specific place, most mentioned e-cigarette use in class (39.1%, ¹⁸⁴⁄₄₇₁) followed by home/room/bed (12.5%, ⁵⁹⁄₄₇₁), school (12.1%, ⁵⁷⁄₄₇₁), in public (8.7%, ⁴¹⁄₄₇₁), the bathroom (5.7%, ²⁷⁄₄₇₁), and at work (4.5%, ²¹⁄₄₇₁).