All LaVeyan Satanists I have met thus far practice selfishness as their religion and are arrogant, self-absorbed jerks. Their religion would better be described as Egoism or Selfishness.
I don't know why any theistic "Satanist" would willingly label her/himself as a Satanist. When most of them explain their beliefs, they don't believe in a Biblical Satan at all, really.
IMO no one should call her/himself a "Satanist" unless they knowingly worship the Christian incarnation of evil.
We were the victims, we were the culprits, we were the children who cried at night... --Abney Park, The Root of All Evil
Don't Mention the Shining Wire!
"Well, there'll be NO BUTTER in HELL!" - Amos Starkadder, Cold Comfort Farm
Leader of the Cockatiel Courts of Chaos!