Actually I've been shocked. None of the sources agree, but a lot say they are against vanity, vengeance, and anything that harms thy neighbor. And they think religion does those things. About the only difference according to some sources is they're a little more selfish than the golden rule prescribes. Of course we're talking about edgy rebellious teenagers who only like Satan due to reverse psychology, not people who actually worship the devil.

A few have gone as far as to say Jesus himself is Satan. Which is of course ridiculous, but I can kind of understand it knowing that this Satan figure isn't the same as the biblical satan who plays the role of a demiurge. Ironically, by Christianity and Satanism's concept of Satan, Jesus actually does play the role of Satan literally by rebelling against the god of this world who is the actual biblical satan. So opposing the satan is Satanic, how about that. Funny how backwards religion can get things.