Metal was in fact inspired by satanism.
Even if it was (and nothing I've found has convinced me either. Many stars saw Crowley as a symbol of freedom, which isn't a bad thing. They figured that they'd rather have the freedom to be "disgusting" rather than be forced to act "pleasant".), there's nothing wrong with Satanism. That you imply it is (as otherwise, why would this be a problem) is evidence enough that you most likely do not know what Satanism is.
No people don't hear what they want to hear. They hear what put in front of them. That being put in Stairway to heaven was on purpose.
No, no. People hear what they want to hear. I listened to that song backwards multiple times without seeing what the supposed "lyrics" are. I heard nothing but garbled nonsense. But as soon as I saw what the lyrics were supposed to be, I started hearing them.
And why I'm even entertaining that is beyond me. Its nonsense like the whole Dark Side of the Moon/Wizard of Oz synch up.