swalsh81I would mostly agree with Sons on those points.
#3 If the person has not specifically said that they can view or use such a video, then, even if permission was given to use the computer, this kind of a video is not a matter of private property but a matter of privacy. Copying such a video (I am speaking of the content as opposed to the specific action as in #1) without permission to view, copy and duplicate the video would have the same result as installing a hidden camera in a bedroom and posting the video on the Internet.
#5 as was stated, a known criminal would have a difficult time both getting to a country because of private airports, would have a difficult time buying land, and I would venture to say that real crimes would be more heavily enforced in a private society than what we have now because the victim would either rely on the best private police force they can afford, or would go after the criminal themselves.