Here's my take. Frankly, I don't care. I'm 23, I don't have kids and my seven year old cousin curses more than I do. That said, I don't think this is a censorship issue and I'm completely in favor of the "Parental Advisory" sticker. If certain movies can have an R-rating, then I don't see the problem in having essentially the same system for music. One criticism I do have—and it is the same issue I have with the MPAA— is that the sticker is often used too liberally and unfairly.
I'd like for everyone to keep this in mind. Artists and musicians are pretty much exactly like screenwriters and actors. They take on characters and write stories. Both, more often than not, produce works of complete fiction. No matter how biographical they sound, song lyrics, in no way, indicate definitively what an artist's belief or ideology is. Sometimes the line between satire and realism is much more difficult to see in music—particularly because you aren't seeing anything. Whether his or her point is obvious or obtuse, I will always take the artist's perspective as the song's true meaning.
Hey!—feel free to comment below. I feel like I'm distributing a magazine on the moon. If you're out there, I wanna hear your perspective.