There is, however, evidence that FedGov can remotely activate webcams on some devices of their choosing.

http://www.washingtonpost.com/business/technology/fbis-searc... The FBI has been able to covertly activate a computer’s camera — without triggering the light that lets users know it is recording — for several years, and has used that technique mainly in terrorism cases or the most serious criminal investigations, said Marcus Thomas, former assistant director of the FBI’s Operational Technology Division in Quantico...