TL;DR: for a whole decade YouTube allowed a copyright troll to claim all the rights on a recording of a washing machine end cycle chime
The account of the copyright troll is still standing and it’s not permanently banned
IMHO in this case YouTube should permanently ban at the first offense any copyright troll that maliciously claim as their property something that’s in the public domain
Also: if it wasn’t that it affected a big streamer with lots of followers, YouTube would have ignored the problem
The thing is that they’re complying with the court case by letter, but not by spirit. Sure, there is a system to report and remove copyright infringement; but the system is 100% automated, full of fails that would require manual review, and Google can’t be arsed to spend the money necessary to fix it.