No, but now that you mention it, I'm curious about the five posts to the official US Federal Bureau of Prisons Instagram[1], which, unlike their Facebook and Twitter accounts, is private.
(No relation, just the first thing that came to mind when I tried to think of an organization that I wouldn't expect to have much of a social media presence.)
https://www.facebook.com/HDMIForum/
https://twitter.com/HDMIForum/
https://www.instagram.com/hdmiforum/
https://www.linkedin.com/groups/8553802