Back in .40d, I had a baron I *hated*. Not just annoyed with, or found displeasurable-- I am talking, pure, unbridled hatred.
This individual had taken it upon himself to relentlessly forbid the export of ANYTHING that was either made of green glass, copper, or a craft good (by forbidding the export of scepters, and due to .40d's legal system, any dwarf transporting a bin containing a forbidden item to the trade depot was immediately guilty and subject to the justice system--meaning any dwarf carrying a bin of general craft goods--naturally containing scepters as well as mugs, amulets and the like-- would get locked up for a long ass time, and probably die of thirst) at the exact moment that the trade caravans with essential supplies would show up.
Seriously, I would have to issue the transport orders the exact moment the caravan entered the map, keep the finished goods piles painfully close to the depot, and then trade as soon as I possibly could and hope to armok's beard that that stupid asshole wouldn't mandate a restriction on greenglass items and scepters before I could get the damned flux I needed.
Finally, one day, I asked on the forum just what, exactly, the consequences of murdering the baron would be. "Nothing", they said-- and so, I murdered him. I murdered him and didn't feel even the least bit sorry.
I locked him in a lavish death chamber, locked the doors, then filled the chamber with hot magma until he boiled inside his own, fat, ugly skin. THEN, I cast the magma into obsidian, cut the obsidian boulder that formed where he had previously been standing, and had it converted into stone crafts. Armok smiled on me, because I got one of his oh so precious scepters out of it- I then encrusted it with cut green glass, and then GAVE it to the elves.
Such was the intensity of my hatred for the little shit.
I haven't felt that feeling about a DF noble for a long time though. These days I'm just content to punish them in creative ways for their relentless mandates for mundane items. (Like stockpiling those items in their quarters.)
But oh-- yes. I used the magma. I used the magma, and I liked it.