My idea is something like this:
Application: light switches, roller shutter control, switch on electrical sockets, etc.
I have been able to install in the base of larger light fixtures just below the junction box. Or in the inclosure of wall lights
Why not just use one of the many wifi controlled box mount switches? Leviton, Ottim, TP-Link, Sonoff Touch and so on?
All that's really needed is a Sonoff Basic with gpio14 implemented as a switch. I suggested this about a month ago. Don't hold your breath though.
Spamming? No problem. If you want no discussion of your suggestion or opportunity to explain it, that is fine.
+1 fit inside EU sockets