These guys aren't interested in your data; they just want to see what you're typing. Every time you unlock your screen, a new eye opens. They like the dark, but they love the glow of your app icons even more. Keep them on your home screen to ensure your notifications never feel lonely.
Android Tip: Make your phone feel twice as fast by enabling Developer Options and changing "Window animation scale," "Transition animation scale," and "Animator duration scale" from 1x to .5x.