The RAWs are available for alteration.
Won't do you any good if the dragons are the same sex.
They aren't, but it isn't really a problem. As I thought about caging him, he stepped into my trap hall and died.
I actually just got my first dragon. He blew a bunch of fire into my entrance, killing the human caravan that had been lingering there for no reason for nearly a year.
I'm actually quite disappointed with dragonfire. I thought they'd throw fireballs that work like ballista arrows, then exhale a blast of fire that rolls to ignite every exposed leather item or [STANDARD_FLESH] creature. As of now, my dragonfire pillbox only killed a single wounded gobbo wrestler, while my catapult battery killed three, crippled the said wrestler, and scared the rest of them off my entrance.
I also conducted a little test regarding my temple's altar inability to function. At first, I tried to make it a simple slashing trap combined with cavein dust. I dropped in all the useless nobles: the baroness, her consort, the hammerer, tax collector, and the philosopher, then pulled the lever. It failed. The dust flooded their tile, dispersed, entered again, and... nothing happened. I rebuilt the system to drop the floor closer. It failed. I then rebuilt the sacrifical chamber so the dust has one more tile to spread from. It failed again. I built a ballista instead, and fired a +copper arrow+ at them.
It failed too. For a moment, I considered flooding my fortress with magma out of fear of having invincible nobles.
Curious of this behavior, I started to conduct the said test. I dismantled my barracks' wall and aimed another ballista there, and stationed some recruits next to the wall. Then an exceptional copper arrow was fired. It went harmlessly through the two of my sleeping (prone) peasants, and decapitated one (standing) recruit. Legless ballista battery operators anyone?
The dust, apparently, will not knock unconscious any creatures on a given tile if it has nowhere to spread from it. This, or it wasn't hitting them for the same reason.