I once had to look into shielding equipment against RF...
I was asked if there was any paint we could use to attenuate RF since we would be putting the equipment near powerful RF dishes...
It was a bad idea since the enclosure we would paint had many holes and cables going into it so even lining it with copper would have limited benefit...
But in looking into RF blocking paints and coatings I stumbled into the rabbit hole of crazy that is 'Electromagnetic Hyper-sensitivity'- folks that have convinced themselves that RF emissions make them sick...
There is a thriving subculture of such people and a thriving industry of quackery that caters to them...