I find this thread quite interesting, for I've always wondered what satanism is about but never really looked it up.
But after reading, I have to say what you describe sounds like a kind of protest/rebellion/provocation religion, modeled to be something like an antithesis/opposite to the common mainstream religion while actually not really diverting much from the original concept. Like someone who believes in god but who has a problem with the mainstream religion of the people around him, considering it too common, boring, old-fashioned and restrictive. To me it sounds like assigning the same old god a new cool name and slightly different attributes.
I would guess that many people who believe in this do not feel really accepted by the society they're living in, probably people who are also dressing in an uncommon way that is meant to communicate "I'm sooo different from you, I don't belong to you and I don't want to be like you, I'm special". Probably a lot of rebellious teenagers who feel misunderstood.







