Oh wow, horrifying. Human are NOT supposed to be the color of Oompah Loompahs. Do these people NOT own mirrors? Yikes.
On a funny note... my friends baby turned orange because he ate so many carrots. He just loved carrot baby food and ate it so much that the beta carotene gave him an orangish tinge. Funny but completely harmless.
As for those with the shocking tan lines, well, Mr Swamp has those. His arms are extra dark and yet his chest and upper legs are white. I just think it is kinda funny but sweet cuz he got that way cuz he works so hard in the great outdoors. He came home one day and I noticed a large red spot on his middle back and asked him had he hurt himself. he said no an then I inspected the shirt he had taken off and it had a hole in it in the exact same spot as the mark on his his back and he had gotten sunburned thru it. LOL!!