Black vinyl tape over the webcam would do the trick. Although from what's transpired so far, I wouldn't be surprised if any student caught doing that would be expelled for "hacking."

With the increasing conflict between what people normally do and expect to be able to do, and what certain parties are trying to prevent by using copyright law, the general public is becoming more and more aware of copyright law. One is always concerned with what one is directly effected by. (Hopefully) things like this will get more of the public involved so that if any changes to the law happen, they are more in favour of the *public*. Somehow I have my doubts that will happen any time soon though, particularly with the corruption and lobbying efforts and such.