I haven't be involved in any violence, not either work related or when I was on the recieving end of an attempted mugging, in about 20 years, more or less. I can't imagine that a person could provoke me into violence, with anything less than an immidiate threat to myself and/or my family.
that said - once I have satisfied myself that violence is going to happen, I am going to do what ever it takes for that violence to end up with me standing and the other side not standing. being as I am a short fat old man, I am assuming that any such conflict will involve a pre-emptive strike from me.
if somebody is obviously working towards attacking me, I wont think trice about hitting him first. that is jsut common sense.