Censorship

Censorship....what excatcly is censorship? For many people it means different things.
For example, some people think that warning labels should be put on cassettes, CDs, and videos. But don't we already do that? That's why they put "Parental Advisory" stickers on CDs and cassettes and doesn't movies have ratings? Thats how you know not to take younger people to see that movie.
CDs, cassettes, and movies aren't the only thing questioned. Books are also put i...