Don’t let your children leave the house without their aluminum-foil hats to deflect those “deadly” Wi-Fi radio waves. There have been numerous conflicting scientific studies on the safety or danger of cellphones, particularly applied to children. The argument is that children’s brain cells are still developing and thus remain far more sensitive to radio waves. Wi-Fi has not been under any sustained attack; but in 2003, some schools pulled out their Wi-Fi networks because of parental concerns over the possible threat to their children. Just how reasonable are these claims?