People who live in glass houses shouldn't throw stones
توضیح: وقتی کسی خودش هم مقصر است نباید دیگران را سرزنش کند.
Janet has often criticized her friend, Lois for driving too fast, yet she herself has had her license suspended for exceeding the speed limit. Lois once tried to tell her that people who live in glass houses shouldn't throw stones, but it didn't do much good. Janet simply didn't accept the fact that she should not pass judgment on other people when she is just as bad as they are.