Are you talking about bringing certain false teachings to their attention via letter, and being told to wait on Jehovah or something to that effect? They've heard it all, and in some level they already know.
They know the blood ban is a product of Rutherford's time that can't hold up to biblical scrutiny, but too many have been affected so there's no way they can reverse it.
They know that the understanding of the earthly resurrection and 144,000 is outright contradicted by the Bible, but too many members have there hopes tied up in these.
They know 1914 is based on shoddy research, but the urgency of the last days and their very 'appointment' in 1919 depend on it.
Even if one of them had doubts, there's nothing they can do about it. They're too far painted into the corner.