DEAR MISS MANNERS: What do you think about people who start scanning their items at grocery store self-checkouts and sending them down the belt before one has finished bagging one’s own items? Related Articles Advice | Miss Manners: My neighbor denies Halloween candy to those she deems outsiders Advice | Miss Manners: The host told me nobody would eat the food I made Advice | Miss Manners: Must I step aside for a customer who is finally ready? Advice | Miss Manners: The plumber billed me for time he was on a personal phone call Advice | Miss Manners: My sister doesn’t work.