Until recently, the only way you could be killed because of flying a kite was to fall off of rooftops, run into incoming traffic or have your throat slit by a glass coated string. Now, you can be tried for murder and be eligible for the death penalty:
http://news.bbc.co.uk/2/hi/south_asia/2978988.stm
My 2 year old cousin was cut on the neck by a stray string some time back. He was sitting in front of my uncle on a motorcycle when they ran into it. He was lucky enough to survive. A lot of others aren’t.