Oh no, Christianity, Judaism, Islam & Buddhism. Those majority of the human race, how dare they believe something you and I don't agree with? Bastards.
Much as I may dislike religion, I have respect for something that's been a huge part of human culture for centuries or more in one form or another. I do not, however, condone using religion as an excuse to tell people how to live their lives, just as I know religious people wouldn't want someone like me telling them that they shouldn't believe in their close-held faith. These sites are basically individuals or groups attempting to use their influence to dissuade others from rational thought processes.
Also, as to whether or not these sites are real, Poe's law goes both ways. It can refer to something extreme seeming like parody, and it can refer to parody being something that was actually extreme. Rational people, for the most part, probably won't take the site seriously in either case. If it's real, it's just some extremist that doesn't deserve attention other than a few chuckles, if it's parody, well, same thing. But for people who are prone to believing that declarations of faith on the internet are sincere (and also match that same faith, or one close enough to it) will, in either case, have the chance of being persuaded that these things are in fact the "will of God." Which I very much doubt would be, because I like to think that if there is some form of deity that for some reason cares about humans in particular, s/he is probably pretty chill.
Lastly, I've seen a few websites on satanism. I didn't particularly study the belief set, but as far as I understand it's a mostly atheistic "religion" that has a desire for the sense of community that you can get from saying you believe in something, and/or the inclusion of meditative practices that substitute for the "prayer" of other types of religions. Basically if you can get past the semi-mocking nature of them calling themselves satanists, they're a decent group of people. Beyond that, I know that most religious people probably won't talk about religion unless it's brought up, so I avoid doing so, but I also have these strong opinions, and am not afraid to let loose if it does. Unless my grandparents are around. I like them and don't want them to hate me for an arbitrary reason so I'll avoid it even if it comes up.
