Totally fair point -- that was indeed my naivety talking; opiates aren't something I have any experience with outside of a hospital.
And you're absolutely right to point out that all of this is skewed by the fact that different categories of (current- or former) drug user will tend to be more covert about it than others, for a wide variety of reasons.
And you're absolutely right to point out that all of this is skewed by the fact that different categories of (current- or former) drug user will tend to be more covert about it than others, for a wide variety of reasons.