We live in a soup of radiation most of it natural. I don't think I'll be wearing the tin foil hat or the expensive , ugly little pendants any time soon. The symptoms most people say they are having from wifi radiation could easily be put down to the sewer of pollutants we live and work in everyday. Sythetic hormones, pollution from cars, planes etc, drugs and poisons in our food and water, I believe pose a much greater risk.
I can see why these people want to give the world one more thing to worry about, they are making lots of money from selling their little bits of tack.