In the printing industry, I see this sort of thing all the time. People assume that drawing a white or black box on top of something makes it go away just becau

In the printing industry, I see this sort of thing all the time. People assume that drawing a white or black box on top of something makes it go away just because it doesn't print out on a piece of paper. My other favorite one is putting a huge image in a crop box to use just a small part of the image, and then complaining that their PDF is still so huge, because, you know, they cropped it so it should be smaller. They seldom believe me when I tell them that the whole image is still there, until I show them by uncropping it inside Acrobat.