Minor rant: I've always been the person to say "You can't judge people unless you work retail or some other customer oriented job for a few years." You sir would not believe the stupidity i've seen in my 5 years of retail service. Just because you think people aren't gonna say it, doesn't mean some braindead idiot will do it.
I've worked in the retail industry and I can relate to your experiences. I just assume that a Top Gear audience would be well versed enough in the automotive field to realize what you can or cannot purchase.