The below pic demonstrates a bug. I don't know if it's reproducible yet, but if it is, I think it might possibly be good to weaponize.
WHAT HAPPENED:
I'm playing a glacier map in a modded version of Dwarf Fortress. There are three modded races: The Holistic Spawn (Mr Frog's), the Seqiv (Mr Frog's), and the Scythod (mine). As you can see from the pic, war has been constant and very, very deadly. I completely filled my refuse and corpse stockpiles.
Then, a beautiful thing happened. A dwarf threw a tantrum and destroyed my bridge. Everyone in the fort was too busy stockpiling corpses (and in the hospital) to rebuild the bridge so my dwarves could escape, so I had someone remove a wall from around my corpse/refuse stockpiles to allow me access to the surface.
What followed was instantaneous. EVERYTHING in the stockpile immediately teleported OUT, all collecting in a single space, as indicated in the below pic.
As this is Bay12, I wouldn't be surprised if someone's already discovered this bug (if it's reproducible). My immediate thoughts went to how it might be possible to set a row of stockpiles filled with heavy/sharp items above a long trench, through which I could funnel enemies. As they entered, I might have dwarves destroy walls near the stockpiles, raining potentially thousands of items down on the invaders' heads. Granted, it would be an awful mess to clean up... but it sounds so dwarfy.
The fort is still alive, and I'm still cleaning up the mess, but I thought I'd put this up.