Do people just not know what photoshop is?

[Aerozord]

I see so many examples of this every day on social media. People share a picture, or a video about how amazing, horrible, interesting, impressive, whatever. Always taking what they see as fact and I'm sitting here thinking, do they not know about editing? How effortless it is to alter a picture of a facebook post or a sign to say whatever you want. Basic editing tricks to do just about anything in a video.

Shouldn't people's default response to things like this be skepticism and not blind trust?