When my sister was pregnant with her 2nd kid, she reflected on a all of the unsolicited advice she got on round 1. Before the baby was born, her husband sent out an email to everyone asking for their advice on baby names and child rearing. The email was in the form of a contest. The winner of the contest assumed responsibility for hospital bills, college tuition, etc.
The humor was well received by all: no one else is raising the kid or paying the bills for the kid. The parents are and they're making all the decisions.
Since it was a blanket statement, no one person or point of view got targeted. They still refer back to that in jest when people give them advice they don't want. Humor really helps to take the edge off.