Oh no! That would be my worst nightmare, as we absolutely love where we live and just finished a major renovation so the house is amazing now, too.
It's a real possibility because our neighbor is in his 80s (having lived here for over 40 years) and his lot is huge (with 3 houses on it). I'm sure when he sells it the new owners will not be as quiet and nice as the current ones.
Maybe I should start buying lotto tickets so we can buy that lot when it's put up for sale?