Why do some people decide to start line/queue right in the obvious flow of foot traffic? Say you go in to a Sbucks and there's only one person in line, ordering at the cash register. You have the choice -- stand right behind the person and cut off foot traffic or stand alongside the pastry case. Why do some people choose the first option? Even when I'm dead tired, I still think 'where do I stand to make sure people can still get through?'

These are the things that drive me crazy. Don't be oblivious!