It's server side. Unless they use a country that says fuck you to US laws. For a long time flies have been checked. Self serving doesn't solve everything because everything at the address would be included in the warrent. Big tech went hard against small self hosts years ago rejecting newsletters, and emails.

I went through this with books long ago.

Idk if you're aware, some of the places books are being put are weird as all hell. My son says anime is the same.