Decency laws?

So the big topic of decency laws is on TV, with heavier fines and keeping a close eye on live events. My question is where have these laws been when it comes to the radio? People freak out over language and sex on TV, but many songs that are on popular secular radio are filled with messages about sex, drugs, and violence, along with some profanity depending upon the station. I think radio should be attacked just as much when it comes to decency has TV is.