A similar source of hate from my retail days would be scanning someone's items and then accidentally scanning the next person's item, which results in the following
First person: "That's not my item, it's theirs"
Second person: "Oh that's okay, they can pay for it!"
Most of my hate/anger comes from driving issues, as I spend a good portion of my job driving:
- Tailgaters. Of course, who does like them...
- Something similar, when I'm driving down a highway (moreso applies to 4-lane) and I see someone coming up right up to nearly an inch off my ass before switching to the passing lane to pass me, even though there was absolutely nothing preventing them from getting into the passing lane much earlier.
- When I'm pulling out onto a four-lane street and at that exact same time, the person who was in the inside lane (for right turn) or outside lane (for left) suddenly decides that that is the exact time they want to pull into the lane I'm turning into, despite there being no other car in the vicinity that they're swerving around or lane that they're slowing down to turn into.