In most campaigns, no matter what the NPC is, he or she will be treated like trash. The NPC in question could be the Queen of Naboo and all the players will care about is if they can sell her clothes for some extra cash.
Players tried that on my NPCs once. It worked well at first, but only because it was supposed to. Then they met their new questgiver for levels 10-15ish, picked a fight, and found out that an Aristocrat/Monk/Fighter can kick their collective asses with a cane and a tire iron when he has home field advantage. His guards just watched.
Unless they can get said title.
Then the tables turn.