You know, the best thing about these sorts of images (which are all brilliant, by the way) is the potential reaction you could get if you printed them out and showed them to naive people. For instance, imagine printing this Nosferafrog and taking it over to a tribe or village that has little contact with the rest of civilization, like in the Brazilian rainforest or something. Show them a picture of this thing and tell them to keep an eye out... They would have no concept of how or why this thing couldn't exist, nor how or why someone would bother to create it!
It's commonplace for us in Western Society to understand the concept of not believing everything we see, but this is only a recent trait for us too - look how many people thought the Earth was being invaded by martians when Orson Welles did War of the Worlds over the radio. That was only about 70 years ago! Would surely be a fascinating experiment, if nothing else lol