According to this article schools in the UK are pulling out WiFi networks due to complaints about health:
One teacher at Stowe School blamed headaches and nausea on the wireless access point installed in his classroom, said James Tearle, head of IT at the school. The access point was removed, and no one else has reported problems, he said.
The geek in me says how can they be so stupid, the fact that schools put WiFi in in the first place was good, increase knowledge and use of computing, no messy wires etc etc
The dad in me pops up and says "well if there is a chance of health damage to your kids it's probably best it's pulled out"