I've driven people to pick up food parcels many ti...

I've driven people to pick up food parcels many times and I can never understand why some people are rushed through on a "take what you are given and hurry out" basis and others can pick and choose what they want and spend over half an hour sending things back and demanding more of what they like. Doesn't seem very fair to me. Also although most of the staff are very nice there are some very abrupt ones.