It appears even the ownership of a device intended for WiFi jamming is not allowed. I wonder if there is a distinction between active jammers and passive blocking methods. Could WiFi-obstructing materials painted on my walls for the purpose of restricting the range of my WiFi to inside my house be considered illegal under some interpretations of these laws?
"We shield you from potentially harmful EM radiation so you can enjoy a safe and comfortable night's sleep."
Also, most of this is done at the behest of an IT contractor, who probably has very little if any influence over construction projects.
If they block them then customers are pissed. "Why doesn't my email work? Why can't I get picture messages?"
If they allow them, people can set up wifi hotspots the same as they were before.
Revenue lost from pissed off customers + cost of Faraday cage + cost buying and maintaining repeater network is definitely going to be higher than revenue from selling wifi.
So combating climate change shows up in cell phones and modems not connecting, or having poor coverage. People have to go out or keep a window open to make a call. The impact is particularly strong with higher frequencies, so generally, the newer the technology, the worse it is.
House owners have started to install repeaters, but FICORA (local equivalent of FCC) says those are illegal. I haven’t heard of solution proposals for this catch-22, government agencies each work in their own silos.
I believe such a "passive repeater" would not be illegal in any sane jurisdiction, since it's nothing more than metal bent in a few specific shapes connected by a cable.