No, you just need to get used to it and decide on a professional response.

Remember - you are catering to the absolute lowest common denominator of human beings when you sell online. Some of these people are so clueless, they cannot drive a car, let alone post something! They probably know much more about the inside of a Centrelink office than a Post Office

Certainly hope no buyers read that one  the3coopers, very inflamatory, I both buy and sell here and have been doing so for over 10 years, new to the boards, but never have I imagined such a thing would be crossing a sellers mind as your post suggests.