Describe some of the undesirable side-effects of repeated, harsh punishment

What will be an ideal response?

Frequent punishment promotes only immediate compliance, not lasting changes in behavior. The more harsh threats, angry physical control, and physical punishment children experience, the more likely they are to develop serious, lasting mental health problems. These include weak internalization of moral rules; depression, aggression, antisocial behavior, and poor academic performance in childhood and adolescence; and depression, alcohol abuse, criminality, and partner and child abuse in adulthood.
Parents often spank in response to children's aggression, yet physical punishment itself models aggression. Harshly treated children develop a chronic sense of being personally threatened, which prompts a focus on their own distress rather than sympathetic orientation to others' needs.
By stopping children's misbehavior temporarily, harsh punishment gives adults immediate relief. For this reason, a punitive adult is likely to punish with greater frequency over time, a course of action that can spiral into serious abuse.
Children, adolescents, and adults whose parents used corporal punishment—the use of physical force to inflict pain but not injury—are more accepting of such discipline. In this way, use of physical punishment may transfer to the next generation.