My sister and rented a large house for a couple of years and got in flatmates. The first ones were really good but later on, not so much. This girl turned out to be a drug addict, would often be so off her face that she'd leave elements on in the kitchen, and we eventually had to ask her to leave. After she'd gone we discovered she'd racked up huge overseas toll bills, and she'd been selling my records (this was the early 80s) to the second hand record place down the road.