Just accuse the poster of lying. You don't need to comment on the need for photographic evidence that somebody is suffering in this context. That's sick - there

Just accuse the poster of lying. You don't need to comment on the need for photographic evidence that somebody is suffering in this context. That's sick - there's neither evidence that the person is or is not crying. The point is that the poster is telling us their observation. You can say it smells fishy and disbelieve them without these bizarre observations of the photo, which obviously does not clearly prove anything either way on its own.