few questions:

1. how do we know? I make much more sense intoxicated that some people do when they are perfectly sober. Should all people who cannot express their thoughts well be banned?

2. Some prescription drugs are worse than the stuff that is not encouraged. Xanax or Valium your doctor prescribe you can have worse effect on your mind than few Cosmos in a bar or a joint after a hard day... what is the difference? Many docs will give out mind altering drugs as if it was candy...