I have no use for social media, and probably never will. Not on Facebook, Twitter, nor any other site except LinkedIn, and that was only for professional reasons when I was last circulating my resume looking for a job change.
After I leave the IT field, I'm going to delete probably 95% of all my LinkedIn connections, because I'll have zero need to ever have any communication with them again.
I don't imagine I'll ever have a social media presence. I've never felt the need to remain in such close contact with past acquaintances, nor communicate my activities to a bunch of people.
Social media works for a lot of folks out there, and they get benefit from it, which is fine. It just has no appeal to me at all.