As I explained on various pages and many posts, I believe our current social media does much more harm than good. It introduces a lot of dubious material, drastically reducing the signal-to-noise ratio within the social network. That being said, I seem to need it. I hope I can be restrained enough not to harm myself or others.
Against my better judgement, I am on Facebook. I try not to spend too much time reading it, but references to some of my blog posts will appear there.
I also use Twitter, mostly for references to blog posts.
Please also see my blogs and other material on Quora.