alt Hacker NewsFrom a definition standpoint, hn is a social media site. From a legislation standpoint, it's not nearly popular (infamous?) enough to legislate (the mentioned sites have had enough negative coverage to manufacturer consent for this invasion of privacy: cyber bullying, destructive challenges, etc.)
When it is, and when your local government becomes sufficiently captured by the user surveillance industrial complex, you will need real world verification here.
>hn is a social media site
Social media typically implies a website where users are sharing self-created content. If a website with comments counts a social media, than all web2.0 is social media and there's practically no distinction between the web and social media.