Ok, first - if that devil/Palin thing is true, it is hilarious!
As codified belief systems go, I'm what you'd call a hard core atheist. But I love the libertine nature of LaVey's tenets.
The "do unto others" concept has been around in every religion - irrespective of how hypocritically the actions of those who believe in the supernatural turn out to be. At base, all religion is entirely about a power structure. And in that sense it is very often the restrictive nature (authority has to come from SOMEwhere) where the individual becomes less than an individual and more of a subject. And that is where I find my greatest disgust for religion. Hitchens said it best "And over us, to supervise this, is installed a celestial dictatorship, a kind of divine North Korea."
But hey, if somebody gets off and fucks with more intensity because they believe some supernatural entity is heightening their actions, I'm happy to reap the benefits!😈 Those dirty, sinful (or, if a Satanist, celebrated) actions make things much hotter. I've had the "fallen" experience a couple of times: one an actual priest, the other just very religious - and wow were those great lays. It was liberating for them, yes; but also I don't for a second doubt they got off a little harder because they knew what they were doing was "wrong".
So: float your boat on the tide that serves you, I guess. I'll end with a Douglas Adams quote:
“And then, one Thursday, nearly two thousand years after one man had been nailed to a tree for saying how great it would be to be nice to people for a change, a girl sitting on her own in a small café in Rickmansworth suddenly realized what it was that had been going wrong all this time, and she finally knew how the world could be made a good and happy place. This time it was right, it would work, and no one would have to get nailed to anything.”