When I first entered graduate school in the 1990s, one professor told us to get access to the Internet or be left behind as an academic. At the time, there were various chats and bulletin boards for various topics of academia. I'm not sure how many of these still exist. Social media is something different and potentially far more hazardous for students. As a sociologist, I can see several research topics that could involve students studying social media sites.
Nancy Tosh