'Stop stealing my milk!' - an office fridge security camera put to the test

A prototype security device promises to film pilferers in the act and email you the evidence. But is it worth entering a moral minefield for the sake of 15ml of semi-skimmed? When you head to your workplace fridge, only to find that some thoughtless colleague has nabbed your milk, what is the appropriate response? a) Shrug it off and say: "Oh well, that only cost me around 8p when you think about it";