I've had a couple of funny experiences this way.
About...oh... 13 years ago while working for a temp agency, I was placed in the customer service/credit department at a major department store in th Southeastern US. I had to speak to a customer who went on a rant about the terrible service she'd gotten in that department previously because all the "n****ers" were so rude to her. When clued her in, you could have smelled smoke from her backpedaling so fast.
Then once when I was working as a telemarketer (dang, I had some terrible jobs when I was in college) for the Atlanta Journal-Constitution, I had a woman tell me that she didn't want to subscribe to the paper because it was full of ads, and when it wasn't full of ads, the only stories in the paper were about "n***ers and queers". Unfortunately our calls were monitored, so I couldn't say anything back... but I sent her a subscription anyway.
Most recently, I called a hair salon in Vancouver to inquire about the method they used to start dreadlocks. The first word out of the woman's mouth was "beeswax". I told her that wasn't acceptable, and she recommended that I come in so they could see my hair grade. When I walked in she told me that the only reason she said they used beeswax to start locs was because I sounded white on the phone.
