wrote:

Why be concerned with a drug screen? The two main reasons why people
might worry about a drug screen a
1) An idiot who is using illegal drugs which will prevent him/her from
being a good pilot
2) An idiot's attempt to hide a serious medical condition that would
impair his/her ability to fly

If niether of these apply to you, then are you trolling?

Do you have teenage kids or live near some or spend some time on campus
(just to name a few obvious hazards but same goes if any of your
acquaintances smokes any); just walking in a room where someone has
smoked pot is enough for you to test positive; think about it if
your job depends on peeing in a cup once in a while...

Then there is the assumption that the tests don't fail (all tests
give either false negatives or false positives to some extents); do
you know for sure the list of substances -- many perfectly legitimate
-- that you might be using that could trigger a false positive?

--Sylvain