Believe me Theland, you wouldn't want to risk not totaly destroying the brain of a determined terrorist, even one in a trillion chance that they could harm you is still one chance, that's all they need.
I was never in that situation, apart from the gulf war, all the firefights I was involved in were long range, 100 metres plus, however, because of the work I was doing in N.I, I was trained in this proccedure by Special Branch and the SAS, so, had the situation arose, I would definatly attempt to remove the threat by destying the brain