The amount of PILOTS who test positive under DAMP is very small. No I don't know the exact figure but when I attended a DAMP course we were given the breakdown of positive tests by job category and pilots were very low.
I am not making excuses for this person, but for someone in their position to take a drug as dangerous and destructive as meth really indicates a serious personal issue. I would strongly urge the RFDS to work with this pilot to help them recover. They are after all a medical outfit.
Even AFL Football players get three strikes and the first two are confidential!
To the affected pilot - take care of yourself and get help before it is way too late, please!