You can’t just change the definition of words because you don’t like governments restricting them. The actual problem is governments attacking your rights, it has nothing at all to do with social media. If instead of restricting social media they restricted specifically “comment sections”, would you be arguing with me on the formal definition of a comment section?

here's the thing. the definition didn't include forums until news casters started talking about it. No one on the internet called forums social media. No one called forums social networks. News casters that didn't understand what they were talking about were the ones changing the definition. It's a bit like newscasters talking about tide pods like people were actually eating them. They were naive, tricked, and didn't understand the culture around it. So falsehoods were spread and now we're in the situation we're in.

No one in their right mind thinks of GM's Blog as Social Media... and yet that's literally where the dictionary definition of social media comes from. A business student wrote a paper and claimed that GM's blog would be considered social media. The entire Webster's dictionary definition rests on one person who claimed some absolutely batshit insane things as social media.

But that's not what people that use the internet actually think. Like you said "It’s like porn, you can’t define it, but you know it when you see it." And forums aren't social media. If they were, then everything is social media and the term is useless.