It seems that the FBI is also quite capable of hacking into your PC to access your webcam and other information without you even knowing, providing of course the malicious software is loaded onto the target PC. Speaking to
the Washington Post, Marcus Thomas, the former assistant director of the FBI's Operational Technology Division said they have been able to do so "without triggering the light that lets users know it is recording" for years now. Thomas also pointed out that the technology is "mainly" used for terrorist operations or the "most serious" of criminal investigations. The report cites an incident where the FBI tracked a suspect called "Mo" who made a series of threats to detonate bombs at universities and airports across the United States last year. The FBI hacker team was able to create a piece of software that used Yahoo Mail as the delivery method and was designed to log the sites he visited, as well as the general whereabouts of the computer.
If you are truly concerned, just buy a $5 cover for it, they make them. A post-it or tape also works :-D