To what extent should the ONUS be on platforms to do this, compared to the ONUS on users to use CRITICAL thinking, research and common sense to determine if content is false or misleading compared to true, factual and evidence / science based.
Surely we as HUMANS need to stop being bone idle once in a while and actually do the grunt work to determine facts.
As OBI Wan Kenobi said (this is nearly right I think)
"Many of the truths we hold on to, depend very much on our own point of view"