my perspective is that my name and copyright were removed from a document i wrote and re-published on the W3C site and that should be fixed. please don't speak for me. thanks.
i doubt if it will come to a DMCA takedown but that is a creative an interesting idea!
maybe someone else could post an issue to their repo. but as the author of the spec i really shouldn't have to do anything to get an esteemed organization like the W3C to respect a CC license and copyright.
And linking to the PR where it got removed: https://github.com/w3c/feedvalidator/pull/68
Or if you want to really get their attention, pull a DMCA takedown.