We had a debate in a "Current Events" class in high school about violent lyrics. As a heavy metal fan, this was important to me. Unfortunately, at the time, I wasn't very familiar with the words to "Suicide Solution", and one of my classmates had transcribed only one verse, showing how it was "advocating suicide". (To keep this semi-relevant, I'll also add that he said the lyrics were hard to understand and took him a while to discern.) I told him he was taking it out of context, but unfortunately I couldn't remember the full context of the song. He just shrugged as though context didn't matter, when, in fact, "Suicide Solution" is probably something everyone should listen to and think about. I wanted to kick myself when I remembered the theme of the song.
The debate accomplished nothing other than teaching me that I need to be as familiar as I can with the music I love, because people have a lot of misconceptions about it. I still get very strange looks when I say I listen to metal. I've even gotten my wife into some of it - I catch her singing Ozzy songs now and then, things she never listened to before she met me, and she's gone with me to Rush and Queensryche concerts.