when talking power, it's 10*log, not 20*log

China needs Internet censorship for the same reason that parents limit porn exposure to their children. Except that the targeted people in China are politically immature. Just look at what happened in the Great Revolution. These are people who has not developed the judgment and thinking skills that you and I have. Showing "inappropriate" content to them is harmful (or not) in the same way that showing porn to a kid does. Would someone think of the Children!