At the risk of getting royally shot down I have to make the following observation ....
I was asked to do some consultancy work in Nigeria, for a Nigerian company. I replied to the intermediary concerned saying simply that I was not interested in going to Nigeria nor in working for a Nigerian company and would they please not waste their time or mine offering me any further work in Nigeria.
Whether intentionally or not I don't know, but they forwarded my reply to the Nigerian prinicipal who emailed me stating that I was now 'person non gratia (sic) with them due to my rascism (sic)'. I have lost no sleep over this but had many a good chuckle over it.