Censorship is needed to help curb maturity levels, like with Girls magazines and unhealthy body images of stick thin women having a bad effect on their own self image.  A world where Ad's push sexual lines etc, or appear on TV stations meant for less mature audiences would lead to Confusion in what is acceptible for that age group.

Would you want to drive with your 8 year old son and him see a naked girl on a billboard having sex with a bottle of Vodka in her hand?  It would lead to a wonderful talk of "what are they doing" when the kid isnt mentally ready for the full talk (yes he should know SOMETHINGS about sex but not be pushed with the full imagery).

So censorship is a good thing,  but for mature channels/latenight programming i believe america tends to overly censor sexual imagery, while OVERWHELMINGLY fail at censoring violent imagery.

but in the end Censorship has its place in even a "Free" society.

Youd be a fan of censorship if you had a 5 year old boy watching Sesame street and big bird starts shouting out curse words and racial epithats, cause its not appropriate for the audience watching =P   Just expand that example to include teens etc who are already Suseptable to suggestion and have a PROVEN, Hampered Judgement for Risky decisions.

Censorship in sumation, is a good and needed thing.