You have to find a way to block it, not disable it.

Whether it’s faster or more reliable depends on the setup. “More secure” is nonsense for WPA2 Enterprise networks, especially as LAN usually replaces WLAN authentication completely. LAN is certainly not “unjammable” and, trust me, most schools and businesses don’t need the lowest possible latencies to every computer because most people in these organizations will be working, not playing real-time multiplayer games where every millisecond matters, especially if this slightly lower latency comes at the cost of convenience and having to install LAN ports in every imaginable location.

That’s ridiculous.
There are plenty of laws controlling Wi-Fi and the
allowed frequency ranges and bandwidths. All of these ensure that only
Wi-Fi devices that don’t pose a risk to humans and animals are produced
and used. By trying to “hack” your neighbors’ Wi-Fi routers or interfere
with their ability to use their network, you are committing a criminal
offense.
You said you wanted to keep radiation a matter of choice,
but is that really what you want? No television, radio, GPS or anything
else that allows the modern world to function the way it does, simply
because you are scared of the ridiculously low amounts of radiation that
have not a single time been proven to have even the slightest effect on
human health? Have you ever considered police radio, life-critical
systems, flash flood and tornado warning systems? Have you ever
considered how many lives these systems save each day? And you want to
ban them because some of these waves in the air traverse your property?
Would you also
ban sound waves? Sure, loud, high-amplitude sounds can be disruptive,
just like Wi-Fi signals with high amplitudes; but unlike with sounds and
thanks to our extremely stringent regulations, you won’t be able to
find these signals anywhere remotely close to your house. Maybe it has
occurred to you that light is also electromagnetic radiation. How long
should your neighbors go to prison for if they leave on their lights at
night, and the light disturbs your sleep? Every sane person would close
their blinds; would you ban your neighbors from using light?
I won’t even start talking about natural background radiation; radiation from air, cosmic and terrestrial radiation and the earth’s magnetic field. Maybe you’re only worried when radiation is produced by humans, but, whether natural or not, radiation is not always inherently harmful. Trying to keep all forms of radiation, harmful or not, off your property is completely ridiculous and only demonstrates how out of touch with reality you are.

;-)