Firstly, it would be important to note that "The dominant position in criminology is that crime peaks in the late teens and early 20s, and declines thereafter", so the effect of such a rule would be applicable, but no more so than another age group altogether.
Secondly, crime rates for juveniles based on the FBI National Incident-Based Reporting System state that rates peak at 3 pm, standard school closure time, and decline steadily thereafter.
Finally, as we have witnessed in the past with the alcohol prohibition, and more currently marijuana prohibition, the more control a government has on it's populace, the less likely such a populace is to obey the government regulation. The more effort the government puts into control, the less likely they are to be successful. This is excessively self-evident in the teenage population, stereotypically being rebellious in nature. To expect that a government could enforce such a blight on personal freedom is ridiculous.