I'm not calling fanfic writers bad people, and I'm not saying they can't be as creative or insightful as any other writer when the talent is there. I just think that we need to keep a sense of perspective and remember, it's not ours. We can talk about it, obsess over it, create multiple threads, dream up alternate stories, and discuss the villain's hair color at length but at the end of the day it belongs to the original person who thought of it, put in the massive hours of work to bring it to the public, and deserves the recognition.
Ah, I think this here is the crux of our differing opinions. I honestly do not think that fanfic writers intend to do anything that compromises the original content. In fact, I believe that most fanfic writers think that they are contributing to, or supplementing, the existing content, and all praise for the original creator, be it Jim Butcher, Gene Roddenberry, J.K. Rowling, or whoever. Those that do somehow begin to think that they are surpassing or supplanting the original work, other than being guilty of extreme hubris and delusions of grandeur, are still just writing into the ether, with little to no chance of being taken seriously or somehow diluting the original work -- which, I would like to point out, is an issue with trademark law, not copyright law*. As long as the author takes the proper precautions, like Jim has done, then I don't think there is any legal issue with the proliferation of not-for-profit fanfiction.
Now, let me throw a monkey wrench into this and posit that the fanfic communities themselves are on significantly shakier legal ground, especially if their websites and/or magazines generate any ad revenue. Or do these communities fall under the Zeran v. AOL exception, where the provider is not directly responsible for the content that its members post?
P.S. Do not fear long sentences! As long as they are grammatically coherent, they are not run on sentences.
*Okay, I did some more digging on Fair Use and copyright infringement, and there is a dilution-like test in the Fair Use exception. However, this works in favor of fanfic authors, because it must be shown that the work in question substantially detracts from the author's ability to sell his or her work, and it can reasonably be argued that fanfic works to expand the author's fanbase, like free advertising. This gets thrown out the window if the work in question is a source of revenue for the fanfic writer, because whatever revenue the fanfic generates detracts from the author's potential take of the fanbase's money.