When I hear the word "controversial" and "lyrics" in the same sentence, I remember that the music business is what it is, a business. From MM to D12, from Death Metal to Rap, to Punk from Disturbed all the way to Rammstein. These are business men and women, they openly talk about how its about making money and selling album, especially to the dumb ass youth who believe that the artist actually live this way or believe in what they are singing about.
So no matter how controversial the lyric, I just see $$$ spouting out of their mouths.