It's my understanding that Ork weaponry is generally awful and unreliable, and actually only works in general because of their latent psychic abilities (Clap if you believe, in TV Tropes terminology).
And that this is actually canon in the 40k universe.
Say an Ork weapon of some kind was wrested from their hands in combat. The only present characters are the Ork and one other character of a non-Ork race. Could the person who stole the weapon use it against the Ork, or would it fail or the wielder be disadvantaged in some way due to the Ork probably not wanting it to work in that case?
To cut down on the opinion posting, let's put this in the terms of the official universe (Dark Heresy or the like). Are there any rules for this special case?