Check out QuickShoot. It makes it possible to shoot photos of people without them knowing it. I love taking pictures of friends at the most inopportune moments. It’s usually when they are talking and I capture them mid-word with their mouth open or making a funny face. They don’t like it much, but it’s funny. Yeah. I’m a jerk. It’s okay. They’ve gotten plenty of pictures of me at bad times.
Of course the downside to this is that you can’t frame the shot properly, but you can capture things in front of, or behind you. It’s a jailbreak app, so you must have a jailbroken iPhone. (Here’s a how to).
Using the app is as easy as adjusting the settings (front or back camera, flash mode and HDR). Then you double-tap the camera icon in the Home Screen. That’s it. There is a small indicator at the top of the screen that lets you know it snapped a picture.
You can check out the app here: BigBoss