Lots of the canons we protect have conflicting details; I guess that the other organizations could theoretically exist as separate Word Worlds. I don't think it makes a fic count as killed if a non-PPC group sporked it, though (although that would get Naga Eyes out of our hair).

The Official Fanfiction Universities are, generally speaking - Jay and Acacia had a little holiday over at OFUM, and the PPC was at least mentioned in Miss Cam's work, so that's definitely part of our universe, but there are some that are incompatible, so I think those are generally ignored. To each their own.

In the Redwall section of the Pit, there are a few writers who write "Suebashers", where their Author Avatar goes in and takes down a usually ridiculously over-the-top Sue. More often then not, we make crossovers in which our Avatars interact and collaborate. It's all good fun. Personally, I'm making it so that my "Sueslayer" is aware of the PPC and often interacts with my agents, but I think it's really up to the sporker. Remember, we operate under the Rule of Cool and the Rule of Funny.