Cool, as long as it's extrapolation (and reasonably confident extrapolation at that) and not just a case of accidental exposeACT (and most CMDRs!) are extrapolating - arrive in system with megaships owned by cult that's easy to disappear into, makes reference to 'we will disappear'. Makes sense, but might not be what happened - hence "decoded message suggested".
Going to bet they're guessing correctly, but who knows.