I came accross this on one of my numerous update lists.
JAPANESE SCHOOLCHILDREN TO BE RFID-CHIPPED
Japanese authorities have decided that tracking children
with RFID technology is the best way to protect kids. School
authorities in the Japanese city of Osaka have decided the
benefits of using RFID chips on kids outweigh the
disadvantages and will now be chipping children in one
primary school.
http://networks.silicon.com/lans/0,39024663,39122042,00.htm