Okay, got a bug. My Protectapony was shooting at some bighorners wandering a bit too close to my ponies, and my ponies are picking up some of his laser bolts he fired. Instead of disappearing, the bolts are on the ground, and my ponies are taking them to stockpiles. I know that it works for bolts and such, but it doesn't seem right to farm bolts. I will look at the laser bolt RAWs and see if I can find a fix.
EDIT: Oddly enough, the laser bolt items go into a food stockpile. I will forbid them until I can find the error, if it can be fixed, of course.
Laser Bolts are a known bug that has been plaguing us for a long while. They are supposed to evaporate if you have temperature on, or something like that. If I remember correctly, exiting the game and reloading it should evaporate the stuff on load.
Of course, noone would mind if you find an alternative/better fix for it...
Okay. Seems that occasionally, the laser bolt will land, it normally seems when it crosses Z-Levels, like bolts, and will not disappear. I have deduced that it would easily be fixed by them acting like non-broken bolts, just forbid them on landing, as to keep suicidals from grabbing a dropped laser bolt in the middle of a firefight between a 12 protectaponies and a Unity Alicorn. What tag is it in a bolt that does that? I will have to check, then test it on my fortress.
EDIT: Can't find any tag which happens to forbid things on drop, I know it happens to ammo like bolts and items off of corpses, and I soon must go for the night.