Heh! That anti-marketing flow chart is great!
Pity when a marketer calls they are rarely English.
I have no prejudice to race or whatever, but if I can't understand someone I'll tell them. You don't call up germans and start talking polish, so why call up an english person and speak in a confusing dialect/accent.
If the person sounds well-spoken, there isn't noise in the background, and they are asking for me specifically, I may ask what it is concerning, and be polite.
When I was called about changing my mobile phone contract to a 3rd party rival phone plan, the person spoke in really difficult to understand English.... their accent was Welsh. I asked them if their accent was Welsh and why they were calling me, then I couldn't stop laughing because I couldn't understand them. Telling someone they don't speak properly usually gets them to hang up.
Once I answered the phone to an indian call centre, and I put on a mock-japanese voice, shouting incoherent words like an irate old man. I was hung up on very quickly.
My dad once answered the phone and told them they had a porn shop.
The simpsons -
Joe's taxidermy! You stuff em, we fluff em! (or words to that effect).
I occasionally hang up on the spot, once I shouted at the person on the other end of the phone to remove our number from their database or the police will be called. They didn't call back. I think I'm quite rude really!