I would generally refer to myself as a pacifist in the sense that I will attempt non-violent means to avoid or resolve conflicts before anything else. If someone attacked me and I can run away or talk my way out of it I'll do that. But if someone attacks me and I believe that those aren't an option, or if I feel my life is in legitimate danger (which I probably would if someone my size attacks me) then all bets are off. If I consider my life to be in danger then I will not only fight back, I'm going to use any force necessary to disable someone as quickly as possible. I will throw elbows at throats, the face, knee the groin, throw kicks at the knees, break elbows, tear ligaments, and if necessary, try to kill someone to defend myself. And the reality is that if you are being attacked, there is always the possibility of the attacker seriously or permanently injuring you, or even causing death whether that was their intent or not. Any attack should be taken seriously as though it could kill you.
It's all well and good to say you'll simply try to restrain someone, or get them in a lock and hold them there until they calm down and someone calls the police, but the reality is that real fights rarely work that way, and unless you're highly trained in that form of fighting and have drilled it 10,000 times and 10,000 different ways it's foolish to try. Simple, fast, effective, and brutal will be your best bet for walking away. Especially against multiple attackers where restraining one will not end anything. No vital area is ever of limits and every advantage should be exploited to make sure that you come out on top.