Elizabeth is set against Lydia going to Brighton because she believes that it will expose her to too much temptation and will lead to a bad outcome. Mr. Bennet not listening to Elizabeth's concerns could be seen as wrong, since he is the authority figure in the family and should be setting an example for Lydia. This also speaks to Mr. Bennet's role as authority in the novel, as it shows that he is not always taking his responsibilities seriously and may be letting his daughter down.