[jryan49]

I only switched tab/windows once (to input the question). So I'm not sure how severely you'd want to rate that. The webcam doing eye tracking might help if the person isn't good a typing and can copy one side without checking if the other is okay...

[goodmythical]

If there's eye tracking I can just wear a mask with see through eyes or use a spoofing mechanism to fake the webcam altogether.