I love this but I don’t understand one thing. It’s relatively easy to find “Anna’s Archive” on the internet, and although it doesn’t host copyrighted content it

I love this but I don’t understand one thing. It’s relatively easy to find “Anna’s Archive” on the internet, and although it doesn’t host copyrighted content itself, it does link to websites that do host copyrighted PDFs, epubs, etc. What’s stopping the FBI (or others) from taking down such linked websites? Isn’t just a matter of time until all of them are taken down and the owners sued?