Please don't throw your toys out the pram, it's unbecoming
Have you bothered to either read my post or listen to the tapes???
As I stated the first time around, the planes are on the ground, moving at low speed (taxiing), hence the risk factor is low to start with, and there are multiple other safeguards in place to prevent any risks.
You're sounding just like the rest of the crowd of irrational health & safety nuts, who seem to think that people can't breathe without a training course an a full set of instructions (IRONY INTENDED!!!).
There are risks, and there are unacceptable risks, and far too many people these days seem to think that any risk is unnaceptable.
-Leezer-