Social media has changed the public sphere. And I would like to add another point. On the one hand, civil society creates its own newsticker streams via Twitter and Facebook timelines with its own content. It is different from the content in corporate media. On the other hand, if you surround yourself with real-life friends only on these platforms a social network turns Biedermeier-style: Closed circles, no outsiders looking in, you are very much entre nous, no one interfering. So, although we receive news over these new channels, in fact there is no danger of anything completely new coming through. And that’s a striking difference between social media and, say, mailing lists and usenet [where you mostly meet people you do not meet in other contexts].
Posting, Mailingliste nettime-l, 5. Mai 2010.