I am, but I disabled the xfinitywifi right out of the box.
Although it wouldn’t surprise me if it “spontaneously” reactivated itself, but even if it did (and Crapcast can be trusted on what they say on this) it’s supposed to be isolated to the point that it gets its own assigned IP separate from what is assigned to your connection
I really haven’t had DMCA issues on my Usenet providers, but you do gotta be choosy, iirc the biggest ones you probably subbed to won’t ignore DMCA