Should songs with violent lyrics should be banned?

In my opinion violent songs shouldn´t be banned.  I think songs are the instrument artists use to express how they feel, or to communicate any idea. Violents songs can lead to bad consequences, so i think they shouldn´t be banned neither promoted. I think the artists are free to write what they want on the songs, but if its too violent or promotes something incorrect, then they should do something. In case the song has something wrong i think they should leave it that way and ban it on radio, tv, etc. but leave it like that on the artist disc or webpage.