I do think that communities and social media aren't necessarily the same. Communities have existed before social media. I grew up on CompuServe, which had a few LGBT groups as far back as 1997, and forums chat rooms have been around for as long as that. "Social media" in these terms, tends to be surrounding anonymous behavior and how people abuse anonymous behavior to hurt and even cause physical harm - which has similar effects in your communities. We can shun the daily posting, swipe-right, anonymous aspects of social media without removing communities - as proven by their existence prior to social media.