Censorship just shows the laziness of parents. Here's what's wrong with censorship:
Swearing = What's the big deal? You're probably gonna hear swearing in public some time.
Violence = Well, if your kid becomes violent, it's your fault for not teaching them about it.
Nudity = You see your own genitals when you're taking a shower of bath!
Smoking = Is it really worse to see smoking on TV than get secondhand smoke in real life? If your kid starts smoking, you failed to teach him/her about it.
Homosexuality = Being gay is not bad! Why can't people get that?! -.- Your kid watches TV and turns gay (being gay might be genetic though.) So what if that happens? Live and let live!