If you're a pervert who likes to take pictures of people without them knowing, you'll love this post. Jokes aside, one thing that annoys me about the iPhone camera is that shutter sound which you can't turn off. There are no options in the settings app allowing you to turn off the shutter sound.
The only way to actually turn off the shutter sound is by switching the mute switch to the mute position. Try it now.
It's a bit silly how Apple didn't put an option for it in the settings, it's an annoying sound. I'd understand if it was the sound of the actual shutter itself, but it's not, it's a fake recorded version of it.