There are several compelling reasons why drug use should be considered illegal such as:

Increased Crime Rates: Drug use is often linked to a variety of other crimes, including drug trafficking, possession of illegal substances, prostitution, gang involvement, public disturbances, robbery, physical assault, sexual assault, child abuse and neglect, and domestic violence.
Sanitation Issues: Drug use can lead to a disconnection from reality and a lack of responsibility, resulting in sanitation problems such as open defecation, public urination, illegal dumping, and littering.
Poverty and Unemployment: Drug use can contribute to job loss, higher dropout rates from high school, and housing instability due to the risk of misuse, which can lead to homelessness.
Health Risks: Drug use, especially through injection, raises the risk of infections, including HIV, which can be sexually transmitted, posing significant public health concerns.
Dysfunctional Families: Drug use can erode trust within families, increase conflict and aggression such as verbal and physical abuse, and normalize drug use, leading to significant emotional distress for family members.
Strain on Social Services and Healthcare: The complications arising from addiction can place a heavy burden on social support services and healthcare systems, as they must address both physical and mental health conditions associated with drug use.                                                                                        Decreased Quality of Life: Overall drug use extensively destroys the quality of life in any given area due to a combination of factors already listed such as collapse of social services, problems with health care, spread of diseases, sanitation issues, poverty, unemployment, dysfunctional families and high crime rate.                                                                                                                      Higher Use By Teenagers: If drug use were to be legalized, the potential increase in availability could lead to a rise in the percentage of teenagers using illegal drugs - currently at 5%. This could result in poor academic performance, lower grades, posing a risk to the education system's success. Additionally, it may lead to other risks such as secondhand exposure, higher likelihood of becoming addicted to other substances such as alcohol or smoking cigarettes, and heightened peer pressure.

These factors highlight the broader societal impacts of drug use, reinforcing the argument for its illegality.