I find that technique very effective in further driving rude,nasty and racist clients over the edge.
I tend to find responding with "white trash" (as I did to a neighbor in Brooklyn not too long ago) or "ghetto Rican" (as I did to a rude customer when I worked in retail) only serves to make them angrier and more of a nuisance.
This sounds like a great technique to make our corporations more inefficient, and build a reputation to be more rude and nasty than the French among people who are our allies. Gee, what a wonderful idea! /sarcasm!