Does playing Oblivion so much you think that magic is real and a valid excuse for a job is "looting" qualify?
I suppose I know some people who can be pretty intolerable about these kinds of things, not only in game though. I have one of the most argument addicted friends you can possibly imagine, everyone knows the kind, who will argue any point, however trivial or utterly contrived into the ground then piss on it, even if you make it very clear you dont care. Did I mention he generally has experiance to in game or an hour scanning wikipedia.
This might be a bit... how should I put this. Pathetic?

But LotR fanboys who recently picked it up from the games/MMO/or just watching the movies really piss me off, when they believe themselves not only more learned in the lore of Middle-Earth and Arda than you, but than anyone in existance. I'm sure fans of other fantasy lore, Warhammer for example get this. An utter, and I use the word in confidence this is what they are without a shadow of a doubt, noob decides he/she is Illuvátars gift to geek kind. When you politly ask them to read some lore then come back and make your points, they get intolerably defensive as if youve insulted them personally. /sigh, Sorry I completely digress. I love the lore of Prof. Tolkien, I've recently let my grasp and knowledge slip somewhat, but I believe I'm fairly adept in understanding more than the common movie goer. By no means the greatest dont call me up on it please
I think its having your personal hobbies, that you do for the fun and social aspects of it, invaded by incoherent, incompetant fools who wouldnt know reason if it was a 2x4 situated in the vacinity of there anal sphincter (spelling?), that gets to us.
EDIT: Not sure if its been said yet but I'll go ahead an say it. DA VINCI CODE SYNDROME!