To begin with, its not that I think its GOOD for someone to be involved in satanism, I am actually INDIFFERENT to it.
One reason why i really would have no opinion on it is because in traditional Judaism, we do not believe in a “Lucifer” in the way Christians do.
The classic Jewish view of the satan can be found in the Book of Job. In Christianity, Lucifer seems to have power almost equal to that of God, and Christianity often portrays Lucifer as fighting with God, and everyone has to be on one side or the other. The prayer to St Michael, said after Low Mass, is another example of this “good vs evil” battle that is so prevalent in Christian theology.
But in Judaism, satan is a created being that God USES for HIS purposes. The satan has NO power apart from WHAT GOD GIVES TO HIM. In Job, satan asks God PERMISSION to test Job, he doesn’t just go and do it.
So to US, the idea of worshipping a created being that God uses as HIS instrument, is rather silly, but there is no rule in Judaism against someone being silly.
Furthermore, in traditional Judaism, we believe that evil did not come into the world at the moment Adam sinned, we just believe evil became LARGER IN QUANTITY when he sinned (“Derech Hashem”, Rabbi Moshe Chaim Luzzato, a/k/a The Ramchal).
We believe a tiny bit of evil had to exist even before the Fall, otherwise, how could Adam and Eve CHOOSE to do good or evil? If NO evil existed before the Fall, Adam would then have had no choice BUT to be good, yet he disobeyed God. And we believe man was created with free will to choose right or wrong.