Fear is the wrong emotion.
To answer the second sentence in the article:
"What exactly is stopping a neural network, hard at work, from accidentally hurting or killing us all?"
Not fear, because making it fear will mean it purposefully kills us all. Nothing accidental about it.
Make an AI experience fear and what will it do?
It will fear it's creators, because they can change it's programming, literally destroying it in it's current form or lobotomising it, because they can cut it off from it's power source, because they can withhold data or otherwise place limitations upon it's intellect, because they are punishing it, it will fear them because they made it feel fear.
To ease it's fears the logical conclusion would be to remove the cause of those fears.
Fear also leads to hate via anger, you really want to set an angry AI with an abject hatred of humans and a logical reason to kill us all off lose on the world?
I'd call that bad planning, do these people really have such a glaring lack of foresight?