You could add the practice of american football and boxing to your list... BTW, Schedule I substances are those that have the following findings: 1. The drug

You could add the practice of american football and boxing to your list... BTW, Schedule I substances are those that have the following findings: 1. The drug or other substance has a high potential for abuse. 2. The drug or other substance has no currently accepted medical use in treatment in the United States. 3. There is a lack of accepted safety for use of the drug or other substance under medical supervision. Tobacco fits this definition.