Yeah I don't think they eat that much, honestly. I have never tried to determine exactly how much food troops consume, but I believe it to be negligible. I mentioned it not because I think it would be significant in practice, but because it's possible in theory.
As far as I know, yes, infiltrators can burn granaries. I doubt one could do it on a sustained basis though, especially if there's also a huge quantity of militia in the region (which would make infiltrator actions harder to complete).
But the judge could just continually release him.
And why does the exiled person need gold? How does that hurt him to lose gold?
