Haha yeah you gotta watch out for "hey this dead guy's shoe is awesome better go get it" syndrome. Best thing to do is to forbid all of their.
And yeah I dunno if a hunter would specifically target a fire imp. I mean, I guess they might if the imp was close to them, but once they're locked onto any sort of critter, they're away. Even if they run out of crossbow bolts. Honestly, I think Hunters have a higher mortality rate than any other job!
LOSING IS FUN.