When you put your milk in the communal fridge and someone takes a drop, I don't really mind. But when you wake up in the morning and could kill for a coffee, you boil the kettle, get the cup out, fill it with granules and hot water and sugar... all you need left is a drop of milk... you just put in a full 2 pint bottle in the day before... you open the fridge and it's all frikken gone, even the damn bottle it was contained in! I'm not sure whether that or leaving the empty bottle in the fridge would have been worse.

Also, when you hang your washing out on the communal washing line. There aren't many pegs so you don't use a peg unless there is an absolute need (such as for shirts whilst leaving the jeans with no pegs). You do this out of courtesy in case somebody else needs to hang their washing out. Next time you look out of your window, you notice a neighbour has put their washing out... and half of your washing is on the grass. You go outside and notice they've used up all the pegs you left extra out of courtesy - fair enough. But they've also decided to take pegs off your clothes too and put them on theirs. They've put pegs on all their stuff AND they only had heavy mats and rugs that didn't need any pegs in the first place! WTF?!