To be clear, I'm planning to make a collection to be used generally for when people want to de-anon! But my experience of being a part of and running kink memes in the past is that posting anon fills to AO3 kills the kink meme, and usually quickly.

In terms of protection, again, I don't see how that supplies it. Someone can easily pretend to be an author cross-posting to the collection anonymously. Hell, people plagiarize fic that has been posted to someone else's AO3! It's just not a risk that can be avoided.