but no one ever thinks: OMFG, just who was in this taxi last week?
with all due respect, the taxi ride and the WG "ride" aren't at all analogous.
more apropos would be any service where preferential treatment is deliberately given to certain customers -- like an airline staffer who bumps up good looking couples to first class, but never does for you and the aging missus.
not only does it engender a sense of unfairness, it also indicates to you, in no uncertain terms, that you don't come across as the kind of person people naturally want to please.