Censorship laws

I was just wondering what americans thought about censoring on your TV channels, for example the censoring of nudity and profanity. And what do you think about the high acceptance of voilence? In my country there are not much censoring, it is just based on the time of the day, for example after ten in the evening pretty much everything is allowed. This is only applies to voilence and sexual nudity though, non-sexual nudity and profanity is allowed any time of the day.

What do you americans think (or people from other countries with similar censorship) about this? Whould you rather have a more relaxed censorship?