It works until every device has a 5G chip on them.

Or your neighbor's tv has internet access, and relays telemetry for yours.

If it comes to that point I will open my devices and cut the antennas

Or extract the eSIM / figure out a way to use it for free internet like some did with Amazon Kindle SIMs.

And then you'll ruin your warrant.

Warranty doesn't mean much to me. I'm an outlier who enjoys repairing their own devices. I recently repaired a week old laptop that arrived faulty (trackpad was messed up) instead of mailing it back.

I'd only cut the antennas in a last case scenario. It's more likely they'd have a connector or I'd try to de-solder them first.

then the pi hole won't even save you. we're going to need to go full on Faraday cage to escape their prying eyes!