"Stressed" is just the generic unhappiness marker and will _not_ result in serious problems. I've only seen tantrums (or other types of episodic insanity) from dwarfs who were "haggard" or "haunted". The worst thing stressed dwarfs do is occupy your mayor with meetings.
Yup, exactly what I observed. Meeting with the mayor didn't help much though, they still had a red arrow.
I haven't yet walled any dwarves off to die yet. I hate having dwarves starve or dehydrate. I just went with what the game handed me, but it was getting ridiculous.
Yup, I upgraded to 40_16r2 and will have to use the script. Would be great if we had a dwarf therapist as job. Nice office with a mist generator and a feather tree wood bed...
You just need really strong positive emotions in order to manage it. Contentment and enjoyment won't do much, but Delight and Joy will definitely help them relax. The main issue was likely that, while stress increases and decreases are capped, stress increases are adjusted (based on personality) after they are capped, so a dwarf with high stress vulnerability could offset the maximum stress decrease with only a few minor negative emotions. Granted, I haven't looked at the stress code in 0.40.18, so it's possible Toady made additional changes to make positive emotions more powerful than they were previously, but they definitely had an effect (to the point that dwarves could easily get negative stress levels).
I think that was what kept my fort going for so long. Everybody had a masterfully engraved 6 tile bedroom and ate in a very nice meeting hall. The really tough cases were still incurable though. I gave my bone carver a royal bedroom, fulfilled his life's dream, gave him time to scream at the mayor or talk to other dwarfs. It kept him stable at a very stressed but content level. But I guess all it takes is a little push and he is tantrumming like a champion.
The kid dropped into melancholy and came back from that state a couple of times. That's something I like, that you can bring them back from melancholy. I hated it when I lost a dwarf because I had run out of something he needed for a mood. It was so sad to see them wander around in a daze until they killed themselves and you could do nothing about it...
If I recall correctly children are immune to being punished for their crimes... but their record doesn't go away. Just wait for them to transition to an adult and all those long delayed beatings come back in one veritable orgy of Justice.
Oh dear, he would have been in prison for years or worse... xD
It was very strange that his murder was never reported though. The mayor joined the battle (I have a part in this/revenge). Maybe it was counted as duel with no quarter or something. Dunno.