I'm cheating a little bit because I never witnessed this personally, but a friend of a friend told me he lived in a 5-person house while at LSU and it had constant infestation problems. They put open food, like chips or nuts, in the fridge and they only had sealed cans in the cupboards because the roach and ant problems were so bad. But they also had the occasional rat. And when they would find a rat, they would herd it into a corner and trap it with big pieces of cardboard. They would set up stools around the makeshift cardboard pen. Then one of the roommates would go get his pet python and place it in the pen. Crack open some beers and showtime.