Canon Defilement

"Breaking into Tolkien's tomb and pissing on his bones would be less insulting than this game!"
Joueur du Grenier (on the Lord of the Rings SNES game), Joueur du Grenier

Fanfiction communities, like any other fandom, have their own set of standards. While technically, all fanfiction is free to just do whatever it wants (hell, all fiction in general is, too), there are a number of topics and tropes that cause revulsion and anger amongst these communities. The revulsion can range from forgivable (most beginning writers are given a free pass for this so long as they aren't particularly mean-spirited) to sending whole communities up in arms (which will sometimes result in being banned as a particularly light sentence).

Also worthy of note is that many cases of traditional canon defilement actually are canonical, but in those cases, it's always when a Promoted Fanboy gets to Run The Asylum and just abuses editorial fiat. It takes quite a lot more for them to really get this term thrown at them, but it generally tends to sting a lot more, since their influence will (usually) affect future stories as well. Please note that it isn't Canon Defilement if the original creative crew is responsible; it's just good old Seasonal Rot/Creator Breakdown.

An incomplete list of things that are generally known to cause this:

There are other things that a good portion of fanbases add to this list, but that many other people really like (or at least think it adds to the story) and are willing to defend:

It is important to note that Canon Defilement does have a subjective side to it. Sometimes, one person's Canon Defilement is another person's fanfiction idea — and criticisms about it being Canon Defilement sometimes get responded to with a big ignore.

This generally comes about because the author either didn't know better or perhaps just didn't care. Often, though, it's an attempt to make it Better Than Canon. Sometimes it's played for humor, but with something like this it can be hard to tell...

No Examples Please!

Alternative Title(s): Canon Rape