Let's say you were some foolish yuppy back in 1905. You haven't seen the world. Not the way you've seen it now (through the internet), so you don't know much. A guy comes up to you and says that there's such thing as a deer-boy. You call him a liar and punch him in the face, but then he shows you this picture. No one would blame you for being convinced that deer-boys existed. How would you know any different? Especially after seeing such a convincing picture. No wonder there were all sorts of fables passing around.
Nowadays you go online and talk about a weird experience or something weird that you saw and a million people give you evidence on how what you saw was fake or misrepresented. Then they call you mean names.