To be completely sure of passing a blood test, you would need to go without a drink for a week.
Hotwings, if you can back up that statement with some good scientific data, I will change my mind. For now, I consider it total bullsh!t.
As for some of the current rostering practices verging on the criminal; I agree wholeheartedly.
Short of the acident-scenario described by COWPAT, I fail to see how we can change this. Money rules.
For all our expertise and experience, we seem to be a very powerless faction in civil aviation.