The funny thing is some of these people who take photos of their
computer screen don't want to bother using the PrtScn key and clipboard after you tell them how to do it. They're just more "comfortable" taking the more cumbersome route, often delivering extremely stupid looking results.
It's not exactly easy to take a good looking photograph of a
computer screen, especially if a smart phone is going to be used to take the photo. The person will almost certainly have the image taken at some kind of angle, which keystones the
computer screen. Even worse: that angle is affecting the screen's native pixel grid and it ain't gonna match up with the pixel grid inside the smart phone camera. It's a great recipe for moire -but that's as long as the image is in focus.

Add in some wide angle barrel distortion for good measure. Oh, and the colors probably aren't going to be worth a hoot as the phone's auto white balance tries to make sense of the
computer screen's output and the ambient light coming from overhead fluorescent lamps typical of an office setting.