Yes, I have heard of that. We have had a small number text us things like "we miss you...are you ok? Can we encourage you? etc".
BUT, when we text back something nice like "thanks for your message, we are doing really well thanks. Hope you are going well too? If we can do anything to ever help you please let us know! Our door remains open at all times"
They never reply back! It is a case of taking away their control and power in the situation!
Remember that in the witness world, it is US that need ENCOURAGEMENT, and NOT the other way around. So they cant fathom the idea that our lives are going well!