I'm another who hates people who do this. I make the effort, you're wasting my time. I do understand sometimes there are circumstances beyond your control - fo

I'm another who hates people who do this. I make the effort, you're wasting my time. I do understand sometimes there are circumstances beyond your control - for example at my last dentist visit they were 15 minutes late due to a medical situation, but they told me as I arrived - but people who habitually do this really get on my nerves.