I just had a great idea for an app. I call it Creepy Stalker Shot. It's a camera app that lets you take pictures without other people realizing you're taking pictures. It superimposes a faint outline of whatever you're taking a picture of on top of something innocuous like an email or a web page or texts. That way you can still frame your shot successfully, but people around you don't know that you're being a creepy stalker.
If you steal my idea please at least make a version for Windows Phone.