I think fighting this is very worthwhile. For example, I think the fight is the reason why The Stack, dataset produced from GitHub, has a form to request to remove code.
do you know if the stack anticipated people who will claim ownership of and request removal of repositories that they do not own? it seems like complying would require github to expend a lot of effort to combat abuse.
https://www.bigcode-project.org/docs/about/the-stack/
I am hopeful that we can make the removal request form the standard industry practice.