Wow. Very good to know.

Wished I'd posted this in /s/Radiation . That info would be good there with citations and links.

For what it's worth, the 3 smart meters in the basement of this building I covered with aluminum foil, then hung an empty lasagna pan over each, then the lid of each over that. I have no idea if the lasagna came in tin or aluminum or silver. Somehow I suspect not silver.

If they're working they're redirecting the waves back towards wall they're mounted on, and towards the neighbours across the road.

If they're not working then they're just looking silly and collecting dust.