Apple has had several bugs to deal with lately. But this new bug in the system for iPhopnes has some serious and scary parts to it. The Facetime app has a glitch that allows people you usually Factime with to watch you through your front facing camera without you even knowing it. So, it's recommended you delete the app until the fix is available.,
To disable FaceTime until the bug fix is released...
- iPhone / iPad: Go to Settings, then FaceTime, and slide the green button off.
- Mac: Open the FaceTime app. Put your cursor where it says FaceTime at the top-left of the screen next to the Apple icon, then select "Quit FaceTime" from the dropdown.