During a question and answer session following a speech at Kenyon College, FBI Director James Comey admitted he taped over his laptop's webcam to avoid being spied upon. Taping over laptop webcams is a popular though weak method for ensuring a computer can not visually spy on your person. The stronger and correct method to mitigate these concerns is physically disconnecting the laptop's web camera and its microphone. Depending on the level of concern about a computers integrity actual mitigations for privacy concerns may be applied all the way through actually airgapping a machine.