Given that:
(a) One of the themes of posters here is that it's impossible to have a nil reading for blood-alcohol; and
(b) We can assume that Norweigan authorities perform alcohol tests frequently and have a zero tolerance level
Why don't we hear about crews getting taken away for being over the (Norway) limit all the time?..
Surely the point is that there are occasions when people are over the limit and while we shouldn't all be quick to condem, we should recognise that sometimes crews don't respect the limits and they do get caught.
IIRC, after the C4 documentary this board was full of "it's all exaggerated nonsense, don't believe a word of it, it's so unfair" type messages; but once all the dust was settled we did find the rules had been breached and that some of the allegations made had been correct...
Like airport security, industry topics like this are as much about perception as they are reality.