[jsgo]

Depends on the relationship of Snopes and Facebook.

If Snopes is being actively used by Facebook in some sort of joint venture for this purpose, yes, I agree there needs to be something (perhaps a new flag_item: true/false field for Facebook to actually act against).

If Facebook is just scraping Snopes and looking for the true or false distinction, well, the onus is on Facebook.

Tangentially, I wonder if this is why there was the hostile takeover thing going on with Snopes a while back (not sure if that has been resolved or not). Since "fake news" is all the rage, I bet Snopes has bumped up in usage either as a fact checker or as an API for things of this nature. So the takeover was probably done in the hopes that an acquisition from one of the networks came and they could cash out.