This document summarizes a chapter from a criminology textbook about public order crimes such as prostitution, pornography, and substance abuse. It discusses how these acts are considered crimes due to social harm even if they do not directly harm victims. The chapter examines legal definitions and controls on various public order crimes and debates around legalizing acts like prostitution and drugs. It also outlines different types of sex offenders, prostitutes, and drug users as well as historical drug laws and various strategies for controlling substance abuse.