A bit of both I think.

As a Facebook group administrator I get to see a fair bit of definite fake stuff. Any time someone posts anything with the word stolen for example, a number of fake accounts will attempt to post with names of people who 'can help get your things back'.

They recently got a bit more advanced and will either use 'I'm new here" type posts to try to trick the admin into letting them into the group. It's a public group, hence a juicy target.

That said, we have a fair share of legit nutters, rednecks, NIMBYs, homophobes etc as well - I just suspect some of the EV and renewable energy hatred on Facebook is manufactured.