The webcam has done wonders for global communication, allowing friends and family to stay in touch across oceans, continents, and apartments. But it's created a few problems. Of course it would: it's a camera that points directly at the person using the computer, and it's attached to the Internet.
It was only a matter of time until someone hijacked it and got a closed-circuit feed of all your computer activities.
Some of those activities might be a tad unsavory, and you might want to close all the blinds, as it were. A small set of magnets to cover your iSight mic and camera, Nope is a far more elegant solution than the usual piece of tape.