I have ignored this for years when I was a digital pirate in Europe.

Fake DMCA bogus can also index you out of google, even your homepage where no 3rd party links are found if you don't fight them

I got lawsuits from the RIAA but non related.

You can safely ignore DMCA's if they're not applied to your jurisdiction, BUT your host and other providers won't when they go upstream unless they also are like in china russia or whatever ignores the US asks