I see the problem you are describing.... But if google or Facebook blocks something, its totally possible that you won't even be able to verify... Things will vanish forever.
Shouldn't blantantly false information vanish forever, or at least be pushed out of the platform? For example, the meme on Facebook that said the Pope endorsed Donald Trump. It was blatantly false; and yet it was shared over a million times.
Truth is super subjective, plus people should be able to spread the memes they choose... It's up to the reader to decide what is real and true.