To dream of bagpipes represents projecting feelings of enjoying being insensitive or enjoying experiencing something insensitive. Projecting feelings that being insensitive is openly accepted.
Negatively, bagpipes may reflect annoyance from others openly projecting their feelings that being insensitive is appropriate when you don’t feel that it is. A casual attitude about celebrating insensitively that others are sensitive about.
Example: A young woman dreamed of hearing bagpipes in the background. In waking life she had just broke up with her first love and her friends were openly celebrating it.