Since you are comparing Fan Fiction to dog crap, maybe I am misunderstanding what it is. I haven't read any fan fiction but the name suggests to me he wants to write a fictional story set in the Dominions Universe. I am guessing by the prejudice and the homoerotic links I am wrong on this? There are more rules to this genre that inherently make it comparable to something vile?
At first glance, I think the nerd hierarchy is coming into play here. D and D guys make fun of LARPers who make fun of those guys that dress in the animal suits etc.
Hah, I found an example diagram!
I am guessing Fan Fiction author is slightly below TBS modder on the food chain, so much like the firetruck stalks the gazelle, you are about the make your kill. The ambulances will have to wait their turn.