Nicole,
You can't cure stupid! There are people who perhaps because they subconsciously find it adds to their own self grandissment, increases their own sense of self worth, will seek to "tell it like it is", or, "not afraid to speak my mind".
Politeness and good manners go out the window. It's more about them and their own self importance than anything else.
We have to accept it goes with the turf. Thankfully it seems a rarity based on the overwhelming positive reports posted here. All we can do is in our dealings with the muggles be as nice, as polite, as engaging as we can be and influence people's thinking in our favour.
