Jerk wad car dealership employees should have let it go. I mean...it was only $7. Situation avoided.
Going after someone like that because of $7 sounds like something George Costanza would do.
7$ was kind of low-ball for a tip, but who doesn’t know that pizza delivery guys do the deliveries for tips and include one? At least, here in the US they do, and this dealership appears to be located in the US.