Here's a good app idea: Take all your facebook posts and replace them with copywrited sections of books. I.g. my cringy posts from highschool become chapters from Harry Potter.
No doubt Facebook would delete these posts permanently and DMCA them.
This may work against you, especially if Bloomsbury Publishing issues an infringement notice to Facebook. In that scenario, Facebook need to place your account on 'legal hold', retaining the account and history indefinitely while the copyright case is resolved. It's possible this would be cold-storage and all past edits.
Exactly the reason why I stopped using sources like Unsplash for free graphics when I was as a young designer. Imagine the Enis' surprise when their shiny new website came under attack by a zealous photographer for copyright infringement. This woman is now a chief editor for a major publisher. This is an awesome idea though, I think I'm going to go with Hunter S. Thompson though. ]:\
Only if somebody complains, I expect, e.g., a DMCA takedown from the publisher. You could also have your account banned as a repeat copyright infringer, which I suppose would be a bonus in this case.
I'd advise against it though, at least in the USA, due to the commercial value of the Harry Potter novels, and the penalties for infringement.
No doubt Facebook would delete these posts permanently and DMCA them.