Definitely the food thing - I once came home to find my house strewn with orange peels as the thief had been peeling it while walking around the apartment. It was from a box of Mandarins, which I ended up throwing out.
I have read that the ‘taking a dump’ thing is mostly because robbery is terrifying and their bowels insist upon it. That is mitigated somewhat if your criminal is an opiate user, because that stops you up.
