“…Cross-sectional surveys report that young adults are aware of, and have participated with, a range user-created alcohol promotion. For instance, 32% report that they have uploaded pictures of themselves consuming alcohol to social media (Morgan, Snelson, & Elison-Bowers, 2010), 56% report that they have uploaded pictures of their peers drinking (Glassman, 2012), 83% report that they are aware of pictures posted by others which document peer consumption (Morgan et al, 2010), 38% report that they have posted on Twitter about alcohol or followed an account which promotes drinking (Cabrera-Nguyen, Cavozos-Rehg, Krauss, Bierut, & Moreno, 2016), and 54% report that they took part in the Neknominate drinking game (Moss et al, 2015). Longitudinal surveys and experimental designs have further suggested that awareness of, and participation with, user-created alcohol promotion is associated with willingness to drink, frequency of consumption, and higher-risk drinking (Boyle, LaBrie, Froidevaux, & Witkovic, 2016;D'Angelo, Kerr, & Moreno, 2014;Litt & Stock, 2011;Marczinski et al, 2016;Pumper & Moreno, 2013).…”