The f**k. They're ELEMENTARY SCHOOL KIDS. If a third the class isn't ill with something, then you've probably got a few pod people infiltrating your area.
Til someone gets a good, fully independent/non biased, double blind, large sample-space and otherwise scientifically and statistically valid study on the go - and it finds that sub-1-watt, non-focussed levels of non ionising radiation at a frequency also emitted by the sun, or at much higher levels by kitchen equipment, somehow causes a measurable detriment to human health - I'm calling horseshit on the very idea.
It's the whole thing that people hear "radiation" and think automatically think "hiroshima, chernobyl" again, then start looking for the slightest pattern of unusual activity around them. Never mind that they'll happily sit out for hours under the planet's largest vaguely-local source of nuclear radiation whilst on vacation. And don't seem (any longer) to have much issue with the very similar radiation required to e.g. run the teacher's cellphone, beam in the educational TV and radio programmes that they may show to the children at some point in the day, allow GPS to work etc. I wonder even if they're maybe close to some power lines, or an air traffic control radar? Either of those -should- have a bigger effect, even allowing for inverse square law and the like.
Wi-fi is the boogeyman of the moment, and we'll see this whole palaver disappear quietly into the dust when the next big bad phantom rolls along. The emissions from a typical 802.11 AP are the radiological equivalent of a mouse fart... in a hurricane. Take 'em on a tour of a radiology, or better yet radiotherapy deparment and let them see some serious (and beneficial - if properly handled) radiation at work. Then tell them that being in the beam does damage equivalent to being stabbed with all the wifi points in their county at the same time. Will they get the hospital shut down because of the danger of that leaking out and hurting the children?
/ex nuclear medicine technician and current IT tech in a department that can't actually get hold of APs powerful enough to penetrate a useful distance through our steel-reinforced concrete structures.
EDIT - oh, and what if they have PCs with CPUs operating at 2.4Ghz, and poorly shielded casings?