The DMCA takedowns have their nets cast too wide. Uncopyrighted works get taken down all the time.
I don't think even they think that anymore:
> On June 28, 2016, the final settlement was officially granted and the court declared that the song was in the public domain
https://en.wikipedia.org/wiki/Happy_Birthday_to_You#Copyrigh...
Also IMO in the digital age it's so stupid that teachers can't even read a book to children via Zoom without a license...