People you work with will have certain expectations of you, and when given the opportunity, can cause a few inconveniences if and when you don't meet said expectations… in other words, people like to be petty. In this case, OP got as petty as petty can get, when she got a shot at making a former coworker's life a little harder than it needed to be. Back in the day, OP was working as a supervisor at a company, and her job included a lot of travel. There was a conference she needed to get to, so…