The song Warning by A (The Band) is a defiant and dismissive warning to someone who has crossed a line and is no longer worth the singer's time or attention. The lyrics make it clear that the singer has no interest in getting to know this person any further, as they believe them to be unstable and not worthy of their time or consideration. The overall message of the song is one of standing up for oneself and setting boundaries with toxic individuals. The tone of the song is defiant and unapologetic, with the singer making it clear that they have reached their limit and will not tolerate any further mistreatment. The song's energy and attitude make it a powerful anthem for anyone who has had to deal with toxic or manipulative people in their lives.