Most people today seem to give a great deal of thought to their personal choice without a great deal of thought to the responsibilities of that freedom or the choices...
1) If Person A is changing the names of files to imitate something more innocent, they are trying to force Person X to see at least SOME things that are not desired. So at least some of their free choice is being taken away unless they "fight back" with technology. 2) One person right to swing their arms stops at another persons face. Unless you have some pretty sophisticated software, you actually have to commit the acts depicted to record them. Child pornography is illegal in most nations (if not all). So some children are being forced into activities unnatural for their age. Is it right to turn your back on evidence of a crime because it is not something you would do or enjoy seeing. I guess you're right it is all personal choice. I think you probably care more than you believe.