>> The song "Shout at the Devil" on the same-named album, and the Satanic imagery and whatnot, was almost certainly likewise just to piss of conservative Christian parents.
Pretty much:
This was written by Motley Crue's bass player Nikki Sixx. In the band's biography The Dirt, Tom Zutaut, who signed the band to Elektra Records, explains that Sixx was exploring Satanism at the time, and wanted to call the song (and the album) "Shout With The Devil." Zutaut was having a hard enough time getting the label to promote the band, and he knew the title would make it an even harder sell, but Sixx was determined to go with the devil theme, telling Zutaut: "It just looks cool. It's meaningless symbols and s--t. I'm just doing it to piss people off. It's not like I worship Satan or something."
When Zutaut saw Sixx two nights later, he witnessed a knife and fork rise off the table and stick into the ceiling. Zutaut writes: "I looked at Nikki and freaked out. 'There is no more 'Shout With The Devil.' If you keep shouting with the devil, you're going to get killed.' I truly believe that Nikki had unknowingly tapped into something evil, something more dangerous than he could control that was on the verge of seriously hurting him. Nikki must have realized the same thing, because he decided on his own to change the album title to Shout At The Devil."
There's also an old TV interview that predates their autobiography where they ask Nikki outright if he was a devil worshiper or satanic and he just laughs and tells them "Pssssshhh no! The album is called "Shout AT the Devil" not "Shout WITH the Devil!""