I'm sure just about everyone remembers Sporkfire the former community manager of PlanetSide. Well he's written an article over at MMORPG.com about Licensed MMO's. It's actually a very interesting read with some personal experiences he had with LoTRO:

Canon can present some issues for the licensed game as well. Fans have expectations and encyclopedic knowledge of their game universes. No matter how much a developer researches this background, there are always bigger fans and alternate interpretations of the lore. A simple screenshot of a squirrel in Lord of the Rings Online sparked a long and heated forum controversy over what squirrel breeds should exist in Middle Earth.

It's a very interesting read! Sadly no mentions of PlanetSide, check out the full article here.