Aren't we supposed to be technologically competent?
In regards to the laptops, what's keeping OP, or whoever it applies to, from physically removing the camera from the laptop?
I know the older MacBook Pro's (i.e. Not the unibody) the process of replacing the display is easily found on the net, and removing the camera itself is just a few extra steps. OS doesn't see a camera and you can't hide what's not there.
Then again, I did buy a first generation MacBook Pro with a broken display. I swapped out the hard drive for a 200GB while I was replacing the display.
So if you're one of those who clings to a warranty (har har, I also buy old, used cars!), then you're on your own.