Get this: Last weekend, I was minding the coffee shop when a woman in her late 50's or so comes up and asks what kind of bagels I have. I look at the bagel tray and tell her "there's blueberry, wheat, and what looks like marble." She asked for the marble bagel to be toasted and with cream cheese. I make all of it and sell it to her.
15 minutes later this woman comes back to me with half of a bagel and says "this isn't a marble bagel. This is a raisin bagel." I ask "excuse me?" and she replies "you sold me a raisin bagel. I don't like raisins. Can I get a refund?" I asked about how this happened and she tells me "I ate the first half of the bagel and on the second half I started to eat when I found raisins in the bagel. I don't like raisins. I thought you said it was marble. Can I get a refund?" So I tell her that I didn't see any raisins when I cooked it and I could've sworn that it was marble. I also said she could probably ask a manager about it. She says "that's not good for business" and I say "Well, I'm sorry ma'am, but it looked like a marble bagel to me." She retorts "well, it's not!" and just marches off.
Today, I'm standing in the coffee shop again when she walks by and sees that I'm there, then shakes her head and keeps walking. Some time later, she's leaving the store and I see her snarl at me on her way out. I giggle and continue whistling, minding my business.
Then, two hours later, I see her walking out of the store again while I'm making a new batch of coffee. While she's walking to the door, she says something like "DON'T YOU LOOK AT ME!" and storms out of the stoor. I then proceed to start laughing my ass off. This woman has become enfuriated over the week and developed a grudge against me because she spent 59 cents on a raisin bagel and ate half of it. I find this particularly hilarious and would love another confrontation!
To put it in simple terms, a raisin bagel is not worth seeking vengeance.