Your Satanist has all the ethics of a Boy Scout, more or less. My problem with Satan, is not so much what has been claimed of him, good, bad, or indifferent, but that he seems to be in conflict with God, and hence a character of duality, whereas God by his nature is a unity. So as Crowley suggested, why would one choose to part of a dichotomy as opposed to being part of a whole? Looking forward to your reply.