I work at this upscale bar inside a hotel were we get weird locals and elite guests whom we have as regulars. So in other words we deal with douche bags all the time. I have a regular who thinks being high maintenance is funny and thinks he can make up by always tipping 30%. Dumb asshole.
He always asks for me unfortunately.
So anyway one day he asked me if I had ever ask the pizza guys to draw me a dinosaur on the box of the pizza before. I answered NO! I would never do that unless I have a hundred dollar bill to tip them with.
There was a young guy next to him whom interrupted, thank god. And later that Saturday night came back and tipped me 300$ just for putting up with that asshole!
-Cindy
Break Room Stories 
At least there are a few decent people in the world.