Greg Price recently submitted an article to the Troy Messenger, Keep those webcams covered:
I attended an event recently and carried my laptop, which is sadly, very common. I brought the laptop for several reasons, but primarily to keep a work effort moving forward while I traveled. As I ate lunch in a large food court, a young man who sat near me approached. He pointed at the laptop and began a series of questions about the device, most of which seemed rather straightforward and obvious. In fact, he seemed to be winding up to something more pointed. And he was.
He pointed at the top of my laptop screen and simply asked, “And that – what is that?”
His curiosity and gaze were directed to a simple piece of vinyl electrical tape. The one-inch square is positioned over the lens of my laptop’s webcam.
Alabama Computer Forensics Institute 