It makes absolutely no sense for there to be radio edits and blanket bans on explicit songs receiving air time. Music is the only form of communication that receives blanket bans by the FCC in this manner. TV shows and movies get different ratings, and as long as there is an appropriate warning label, it can show anything short of pornography. The moment a musician says any word worse than "damn," whether drug-related or a simple curse word, it's considered to be "explicit content" and they get censored and/or banned from the air. A radio station should be able to say, "we're going to play an explicit content song, so if you don't want to hear it, change the station." It's honestly ridiculous that such puritanical regulations are placed on a single industry.
/rant
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The only problem I have with this is if an artist wants to be relevant, they have to contour their artistry around these boundaries. For instance, despite Kanye being one of the biggest artists on the planet, no songs off of [i]Yeezus[/i] got much radio-play at all because of their subject matter. This was intentional, however an artist with less leverage than Kanye wouldn't be able to stay very relevant and may struggle in the industry without contouring to the radio. People talk about how music is "watered down" these days, when realistically it's the radio that makes it seem that way, something it has literally always done. 2015 and 2016 have been great years for music, and it takes a narrow sighted individual to not see that. With streaming and social media becoming ever more influential on the market, I hope this dispels some of the pressure the radio has on artists.