I do the same thing! They hate it. I like having larger coins, so I carrying around change when possible, esp. if traveling. Doesn’t it just fry you, though, that they can’t figure out this basic math?
Oh... my favorite story: went to Chili’s for dinner with the little lady one night. It was storming and Chili’s was one of the few places with power. We went to pay, and they told us, “Oh, the computers are down due to the storm, so we’re taking card numbers for later.”
I told the girl, “No problem, I have cash.”
You’d have thought I was paying with gold nugget. The bill was something like $36.80, and I gave her 2 $20 bills. First she came back with $4.20. I told her she was a dollar off. She came back with $5.20. I just shook my head and laughed. She called over her manager... she proceeded to argue with me that $4.20 was appropriate change. I was flummoxed.
Remember, I’m only 32. This manager looked older than me and even had issues with basic subtraction.
I have been carrying a coin-purse for the last 5+ years. Sure sign of being an old man ;-)
However, doing so has stopped the dreaded buildup of excess coins. And using change with cash payments regularly results in amazing situations, usually involving youngsters!