I was thinking about this the other day.
A common way for apostates to "fade" is to pretend to have depression or anxiety problems.
Is it possible, that when apostates become known, the elders report to the Society that said person was undergoing mental health problems?
I can see a scenario where the Society then took those statistics that were reported and just decided, "Well, it looks like the only ones leaving are those with mental diseases."
Oh, and not to mention the subliminal messages conspiracy theorists. I mean, if subliminal message conspiracy theorist doesn't scream some kind of mental issues, I don't know what does.