I don't see any survey. Why are we seeing a /. post whose central tenet is suggested by a survey that isn't referenced?

You should have your car checked to make sure the energy-absorption structure under the bumper cover isn't permanently crushed, which would make it ineffective next time.

As PatPending alludes, "RF radiation causes cell damage" only when levels are sufficiently high to do so, i.e. sufficiently high that absorption by the tissues in question causes them to become signficantly heated or undergo some sort of chemical change (the latter of which seems to be an elusive phenomenon, except in the case of high-energy "ionizing" radiation, such as X-rays, according to a search of www.arrl.org). I wonder about those nanoparticles, though. There have been some worrisome reports about carbon nanotubes (a nanoparticle, although perhaps with unique biological interactions) permeating cellular membranes, making it difficult to control where they end up in the body.