At Lady Sneerwell’s gathering, Sir Peter expresses his disapproval of the gossip that is happening.
He does not participate in it, and in fact, he believes that such gossip is harmful to people's reputations.
Sir Peter goes so far as to suggest that there should be laws governing gossip to prevent it from ruining individuals' lives.
This statement reveals his concern for social propriety, even though he himself is involved in the world of scandal and gossip.
His discomfort with the behavior of others contrasts with his own participation in the social systems he criticizes, highlighting the hypocrisy that runs through much of the play’s depiction of high society.