I have only lost my temper with one person so far and it was a sixteen year old kid who was not even a clietn but he kept demanding to work for us. He wanted to see things and touch things and play with SSH and install things. I finally just told him H e double hockey stick no and told him not to talk to me again.
Presistance does not always gain you a win.
He wont be much of an effect on the overall out look of BHN though. And, then if he does start throwing fallse statements around he does live in the U.S. so then slander can always shut him up.