I wish that webcams on laptops had open-source hardware and also a hardware switch, which connects and disconnects the webcam from the laptop (and thanks to open source hardware you can be sure, that the switch has no "back-door"). Turining that switch off and on would be much easier than putting the duct tape off and on all the time.

Similar hardware switch would be useful for cameras and microphones in smartphones. You can never be sure, what your iOS, or Windows Phone, or some modified Android OS is actualy doing.