That question must have a good, safe, helpful use. Anybody with malicious intent can get that information on more suitable boards, but SO won't ever become a comprehensive resource if we don't allow potentially harmful questions.
Plus, if you know how something bad is done, you're one step closer to combating it. It's good stuff to know.
edit: Alright, reading the question it seems he wants it for an "unkillable process"
That seems very fishy, but I still believe that it's good information to know, and he could get it somewhere else if he had truly malicious intent.