You should not interfere with other people's lives
John sees Jake gambling at the local casino.
John wants to tell someone that Jake is gambling.
John calls his own wife and tells him that a friend is gambling, and he just wanted to tell someone.
John calls Jake's wife and tells her that Jake is gambling their money away.
Jake never knows that he's being talked about and continues to have a fun night gambling.
Jake's wife is angry at Jake and starts a fight when Jake gets home.