I've seen people here with games where a PC was a LE-type or follower of Asmodeus, but what about a PC that is CE or a follower of a demon lord? Aside from the issues of having a demon-worshipping character in the party. There is evidence that fiendish types have infiltrated Crusades both past and present.
A specific case, a Cleric of Nocticula. Considering the surprises in the later half of the books, how much trouble could that cause, or be used to cause trouble by the GM?