Heretic of The Seventh Circle
I have never seen evidence of the Celts doing those things, nor the Norse or other Germanic peoples, nor the indigenous Basque people, nor the ancient Persians (who explicitly let people keep their gods and kings, so long as they paid taxes, levied troops, and followed the rules), etc.Bane is a member of the Faerunian Pantheon, right? Right.
So Worshippers of Bane revere and make offerings to the entire Faerunian Pantheon, right? Wrong.
So Worshippers of Bane go to the same afterlife as other members of the faith of the Faerunian Pantheon, right? Wrong.
Hang on a minute...
Maybe not "General Rules" as you would imagine them. But they're reflected in the polytheistic religions which survived long enough for us to know about them.