The document discusses three situations that can lead to a lack of discipline in teenagers: disrespectful behavior, school misconduct, and curfew violations. Disrespectful behavior and school misconduct can cause immediate conflicts but long-term can contribute to issues like low self-esteem and disrupt the learning environment. Curfew violations can result in disciplinary action from parents and legal consequences in the short-term, and repeated violations may cause long-lasting implications like difficulties obtaining employment or education.