Unnecessary food waste. If it is a spud or the mangy looking mushroom at the bottom of the punnet then fine, no issue but it is when people buy random stuff, don't eat it and chuck it away: for example-my colleague bought some chicken breasts to cook during the week, she couldn't be bothered so had a take away, the chicken went over and had to be thrown away, many a time she has thrown away chicken, pork etc... Her blase` attitude really annoys me. I was brought up in a money tight household so food was not wasted, even though TVC and I are financially stable we still won't waste food, it is not the money but the principle.