drug/alcohol testing policy: effective?

"Capt.Doug" wrote in message
"Happy Dog" wrote in message Operating a commercial vehicle while under
the
influence of alcohol is very different from operating a commercial vehicle
a couple
days after you smoked a joint.

It may be unfair that one can not partake in getting high when one has
several days to recover. You have any reasonable way to accomodate the
casual user and still weed out the chronic users?
In the end, most professional pilots accept that they can't partake. It's
a
compromise and flying is full of compromises.

The issue I was raising is efficacy and cost effectiveness. And, the
pro-testing camp don't have solid evidence that random drug testing of
aviation professionals is either. The debate quickly degrades into
name-calling and accusations that people who oppose it are crazy or drug
users themselves. But, stick to the efficacy and cost-effectiveness issues
and it doesn't look justified. It's promoted by hype and hysteria.

moo