DEAR ANNIE: A few months ago, someone wrote to you about how uncomfortable the bad manners of children of a relative made her feel at large family gatherings and dinners. … The writer mentioned that another family in attendance displayed commendable behavior. That presents a golden opportunity, and I would offer her this suggestion: Compliment those well-behaving children in front of all assembled at the table. Compliment the parents of those children. No matter how rude the other children are, ignore their bad behavior. But watch for good behavior from them, and compliment them immediately …