Are Board of Education members immune to Death Feedback?
Somehow they've figured out that using additional objects or creatures to carry out the actual killing is a workaround which doesn't trigger the death feedback reaction. I suspect it was made clear at the time the death feedback was invented and introduced to people. There had to be some way to kill the deviants and possible mass murderers in case some genetic or other type of disorder prevented death feedback from preventing more deaths as intended.