Living with other people is always going to lead to arguments.
But these pictures capture some of the very worst examples of bad roommate behaviour.
From eating someone else's food to leaving dirty dishes in the sink, many of these snarky notes were left by people who were fed up with others' bad habits.
Others were put up by flatmates who were too lazy to finish a job like change a lightbulb or fix a switch.
Some of the messages received equally prickly responses from flatmates unimpressed at being told what to do.