Well as for the comments about pilots taking drugs.
here here
But unfortunatly the whole story is suspect because
CASA HAS NOT COMMENCED TESTING
and will not do so for another month or two yet, and that is a FACT.
If the testing did occur, it may have been at the request of the employer and done under contract by them. There are several companies out there who do this sort of testing on request, just like the AFL.
There has of course been testing of aerodrome staff, pilots and engineers going on in northern WA for some time by a Kimberly shire, and I understand that in QLD a copper can test pilots as it's in thier local laws.
Richo