What are some things people do that's annoying but not completely irrational?

To avoid making this post a rant, I will give an example.<br><br>1\. People who don't say "thank you" when you hold the door for them. Yes it's rude and frustrating but maybe they just had a bad day and didn't notice you holding the door for them.<br><br>Another example came to my mind.<br><br>2\. When drivers are on their phones at a round about (they're popular where I live).<br><br>It's simple, put your phone away and focus on driving. But maybe they were expecting a call or text and wanted to see who it was. Or maybe they just didn't put their phone away in time and wanted to tell the person on the other line that they're driving right now.