Nope, but only because I use it anonymously, same as reddit. To me, context is the key to every designation, so it's not whether a site is or isn't social media. Some platforms support social media usage, but it's the way the individual user uses it that makes it social media to them. I personally do not have a social media presence, and can't see ever wanting one.

EDIT: At best, HN is a link aggregator in the form of a discussion forum.