Yes this is very true....we as christians however have the choice what we will subject our minds and bodys to....we do not have to have that kind of TV, music, reading material..etc. So we make a choice who our God is, As for me and my house..we will serve the Lord.
Unfortunatly the unsaved have the things of this world, that is were our witness for Christ comes in....and with the leading of the Holy Spirit we can prevail against the thing of the world.