When faced with a question about whether or not to listen to a particular song, I always try to use my discretion. I tend to take these issues on a song by song basis as opposed to grossly overgeneralizing everything. So, if an artist makes music and some of their songs are inappropriate, I won’t listen to those songs. And if they make music that is good, then I’ll listen to that instead. If you see someone like Marilyn Manson who uses offensive imagery at times and look at individual songs, I’m sure you can find songs that are fine, and I don’t see a strong reason why it would be wrong to listen to those good songs. Some people may not be far along in their relationship with God. Others may not always act in the most moral way to put things lightly. However, that doesn’t mean that everything they do is wrong and should be avoided. This is just my 2 cents on this question.