Prohibition didn’t eliminate cannabis — it just made it unregulated, untested, and controlled by illegal dealers. More than a decade of data from states tells a consistent story: teen use is down, police resources are freed for serious crimes, and hundreds of thousands of Americans are no longer being arrested for a substance that most Americans support legalizing.
The most consistent argument against cannabis legalization is that it will increase use among teenagers. A decade of federal survey data shows the opposite: teen cannabis use has fallen to a 30-year low even as 24 states have legalized adult-use sales. Licensed dispensaries, with mandatory ID checks and financial stakes in compliance, are demonstrably better gatekeepers than illegal dealers who don’t check IDs at all.
Under prohibition, there is no age verification requirement because there is no regulated point of sale. An illegal dealer has no license to lose, no regulatory body to answer to, and no financial incentive to turn away any customer. Licensed dispensaries operate under mandatory ID verification requirements, face financial penalties and license revocation for sales to minors, and are subject to regular compliance checks by state regulators.
State regulators in Washington, Colorado, and California have conducted thousands of controlled purchase attempts. The results consistently show cannabis dispensaries outperforming alcohol retailers: Washington’s Liquor Control and Cannabis Board found minors denied in over 94% of cases at cannabis retailers, versus only 81% at alcohol retailers. Colorado regulators found a 99% refusal rate in 2023. California’s 2022 inspection study found 100% compliance with ID verification policy. A 2025 study by the American Academy of Pediatrics in New York City found 100% of licensed retailers checked ID, while only 10% of unlicensed stores did.
In the decade since 2012, the percentage of 8th, 10th, and 12th graders reporting cannabis use has declined 32%, 37%, and 23% respectively, according to NIDA’s Monitoring the Future survey. Nationally, 12th grader past-month use fell from 22.6% in 2011 to 16.2% in 2024. A 2025 MPP state-level analysis found youth use declined in 19 of 21 states with before-and-after data. Multiple peer-reviewed studies — in JAMA Psychiatry, JAMA Pediatrics, and The American Journal of Preventive Medicine — have found no statistically significant link between legalization and increased adolescent use. Licensed retailer compliance check data consistently confirms regulated dispensaries do not sell to minors.
Cannabis arrests peaked at 870,000 in 2007 — more than the total number of arrests for all violent crimes combined that year. Even after significant state-level reform, over 200,000 Americans were arrested for cannabis violations in 2024. Nine in ten of those arrests were for simple possession.
A cannabis possession arrest is not a minor administrative inconvenience. It creates a criminal record that follows a person for life — affecting employment applications, housing eligibility, professional licensing, student loan access, and in some states voting rights. The Clean Slate Initiative estimates that 77 million Americans — roughly one in three adults — have a criminal record. Cannabis enforcement has been a major driver of that figure, particularly in states that have not reformed their laws.
Filter Magazine’s analysis of 2023 FBI data found that 86% of all possession arrests occurred in states where cannabis remains illegal. Texas (25,500+ arrests), Georgia (9,600), Louisiana (10,300), and North Carolina (10,100) were among the highest-volume arrest states.
Every hour a police officer spends processing a cannabis possession arrest is an hour not spent investigating a robbery, assault, or homicide. At peak enforcement in 2007, cannabis arrests consumed more law enforcement resources than all violent crime arrests combined. Research from early-adopting states shows that when those resources are freed, outcomes for serious crime improve.
A 2018 analysis by researchers at Washington State University examined crime data in Colorado and Washington before and after legalization and found that police solved significantly more violent and property crimes after legalization laws took effect. The mechanism is straightforward: law enforcement agencies have finite personnel, and shifting resources away from low-level cannabis enforcement toward violent and property crime investigation produces measurable results.
A separate peer-reviewed paper in The Economic Journal found that legalizing cannabis reduced crime by displacing illicit markets traditionally controlled by drug dealers and trafficking networks — reducing turf conflicts, eliminating street-level transactions, and improving community trust in law enforcement.
In Denver, research found that dispensary openings were associated with approximately 19% fewer nearby crimes — likely due to the security measures, lighting, and steady legitimate foot traffic that licensed retail operations bring to a neighborhood.
The ACLU estimated that enforcing cannabis possession laws cost the United States approximately $3.6 billion per year in 2010 — covering police time, prosecution, court processing, and incarceration. In 2022, cannabis accounted for 30% of all drug arrests nationally, and the vast majority of those arrests — for simple possession — result in no meaningful public safety benefit.