I was talking about this with a friend who plays death metal, and he told me he knows people who name their babies "Lucifer" or "Demian Beelzebub". He knows a little girl named "Lilith Tiamat".
It's like those douchebags that named their kid Adolphe Hitler. All they care about is making a statement or pissing off society and not thinking about if the kids would really want to be called that their entire lives.
