You should be. Adrian Kingsley-Hughes explains:
Pretty much every laptop – and for that matter, tablet and smartphone – has at least one camera fitted that’s pointing at how all the time. But how worried should we be about eyes on us? Can the nefariously-minded switch them on to spy on us?
Yes. But how? Why?
I’m sorry, but short of taking a screwdriver and wrenching the camera out of the laptop’s bezel, I don’t see any way to prevent a hacker gaining access to the system’s camera when someone so compliant is at the wheel. If someone is willing to download this, install that, and disable the other, it’s like the hacker is sitting at the keyboard, and pretty much has free reign over the system.
Too many computer users are eager to hand over their devices to someone else.
I’m also confident that someone paranoid enough to have a piece of tape over their webcam isn’t likely going to be as obedient, and if they happen to strike that perfect balance between suspicious and obliging, there’s little to prevent the hacker coming up with some bogus story to get them to remove the obstruction