Besides the USB devices just mentioned, cell phones and other data devices are problematic for several reasons. Cell phone cameras, Wi$-$ Fi$,$ Bluetooth, and hardwire connections are great ways to accomplish data theft. Some of the more advanced data companies can detect these devices being used, but no one has been able to detect a photo being taken of a computer screen. Cameras have some other ramifications. There have been sexual harassment and privacy cases against companies that allowed employees to have cameras on them at work.