Who decides which posts are fiction and which are fact, though?
Well that's exactly the point.
It appears that a lot of posters will believe anything because they have seen it written down. It is not difficult to do a bit of basic fact checking.
@amelietaylor of course there are plenty of knowledgeable health professionals posting facts, but there are posters on some threads stating "Ihave just been sent this by a doctor friend". No, no, no you haven't. You have mindlessly copied and pasted something from social media which begins with the words "I have just......
A very simple google search will often intantly show a lot of these "facts" up as nonsense, but instead of checking, people just copy and paste, copy and paste, copy and paste and that is what is contributing to the scaremongering.
I responded to one post the other day where someone had started a thread to see what they needed to do now that the UK was in LOCKDOWN (their capitals, not mine). FFS, the UK isn't in bloody lockdown - not even close. Why, just why would you post that?
It is great when posters respond with links to verifiable sources, but there is far too much "I heard" "Someone told me" which, combined with the woeful lack of basic common sense is actually quite alarming.