There's an episode of the Simpsons where Bart, under the influence of a test medication for ADD which makes him hyper-efficient, calls his sister Lisa a "time burglar" for wasting his time in snippets by talking to him about things of little importance.
As of late, I've had the distinct feeling that my students are time bandits as well. As it is, I give up my free time to assist students in ways in which I'm not strictly required to do so. I do research on the internet for them and recommend sites or print out helpful information. I correct their homework outside of the lesson time when I'm not even required to give them homework at all but I do it because I believe it helps them improve more rapidly. For one student, I read her assignment information to help her do college courses and it can take hours of extra time.
These things aren't things that I mind so much but, recently, they've been stealing my time in annoying ways. One of them is frequent reschedules which require back and forth e-mail communication. Another is absences which require me to communicate each time with the referral agency. The biggest and most irritating is the last minute whipping out of some work document for urgent correction as the lesson ends or the questions that come at the end of the hour which are hard to rebuff or cut off. I have tried to end lessons 2-3 minutes before the precise end of the time but, invariably, they manage to string things out longer regardless.
The attempts to extend the lesson beyond the hour are the ones that bother me the most as I think it shows little respect for the value of my time. It also annoys me more because, if I tried to pull the reverse situation and cut lessons short by 5-10 minutes, the students would surely complain that they are being cheated. Only one of my 9 or so students seems to respect my time enough to hustle out when the hour is up. The rest seem to always be searching for a way to get an extra long ride on the English train.