XB8 - has anyone been successful placing a Farady Cage to block wifi interference from it ?

I was surprised to see so many WiFi being broadcasted from the XB8 (and previously XB6). I wanted to disable all the WiFi.

I do have Ubiquiti gears at home, no need of their surveillance. Though, I have not been convinced by the officially supported modem for their next gen speed tier, and as upon signing there was the rental for free, and only $10 more a month for the xFi Complete just for the no data cap, I thought, let's go with the XB8. This only to realize that it takes a ridiculous minimum 24Hr to disable the Xfinity WiFi hotspot (if it ever disables it from my XB8).

I still have 5 hidden networks, and 2 that are named "xfinitywifi", which I believe is for the public hotspot, open network, and a "XFINITY" network with a WPA2-Enterprise security, which my free phone line can connect to. I guess it's good for wifi calling and data.

Per my understanding, these hidden networks, I would not be surprised if one would be for xFinity technicians, and per what I read, it's for Home Security devices.

In a  way, I am wondering how many of these gateways are out there, using radio signal for nothing. The global electric consumption it represents must be tremendous.

I had two ideas, dismantling the box to physically disconnect the wifi components, or placing a Faraday Cage.

In a closed topic, two suggested that. (‎XB8 Gaeway - how to disable Hidden Networks | Xfinity Community Forum)

Has anyone ever been successful with a home made faraday cage ?

If someone was successful, can they share theirs and how the made it ?

Thanks