Alcohol can be, and often is, consumed w/o the intent of getting intoxicated.  Thus individuals can drink and then drive...provided, of course, they don't drink enough to be "buzzed" or more.  Marijuana, however, is specifically used to get "high."  This is quite a difference.  I have no issue with persons getting high in their own homes.  I do have concerns with folks getting high elsewhere and then driving.  Is this an unreasonable concern?  Gary Crum