Online participatory cultures (e.g. social media) present a number of opportunities and challenges for language learners. Learners can collaborate with like-minded peers in online affinity spaces or get crowd-sourced information from the locals of a target culture, but they also run the risk of getting lost in the overwhelming amount of noise and disruption in these 'wild' environments. This proliferation of user-generated content requires new forms of information literacy, so that everyone has equal access and ability to participate in modern social environments. English language learners (ELLs) may require extra training in using English-based social media effectively, but to date little research has examined this area. This study investigated the characteristics and trends of ELLs' use of social media, how language abilities and previous social media experience affect ELLs' perceptions of anonymous user-generated content in an online discussion website (Reddit), and the strategies learners use to overcome the challenges they encounter in these online environments. The results indicate the importance of adding a sociocultural pragmatics component into the framework of social media literacy and were used to inform recommendations for future social media training programs.