Just got my military up and running, and some jerk went berserk because I didn't have enough shells for his clothesmaking brainstorm. I sent 12 novice axedwarfs to kill him, and they caught up to him right in the middle of my kitchen/brewerie/food storage wing. A savage beating ensued, but to my dismay, their training axes (haven't gotten metal up and running yet) cannot do more than yellow wounds to the guy. They've been pounding on him for two seasons now, the kitchen's too scary for anyone to go in, and after all these months, everyone's starving, everyone's terrified, my fort layout is such that I can't get past the guy to build or do anything, so his horribly bruised, unconscious body laying on the floor is going to bring about my fort's ruin. Graaaagh!
I can't even collapse the ceiling on him, since he's right under my butcher's shop, and no butcher will walk by him to deconstruct it in order for my miner's to channel.
Seems to be that everything, not just zombies, should have some kind of HP, so this sort of thing won't happen. Three seasons have passed now, and the guy's been under constant assault by between six and twelve dwarves. He's actually healing now, a dog bit him and gave him a brown throat wound, and it's better. At least reduce the terror effect from unconscious enemies, so my guys could get a drink...