The WTS teaches to avoid the bad association of people who used to be JW but left the organization. R&F are instructed even not to read their material.
In connection with the exhibitions shown in Europe about the JW persecution in Hitler Germany, Johannes Wrobel, head of the Watchtower History Archives at the German branch office, in a speech quoted well-known apostate Hans-Jürgen Twisselmann on his opinion on the Stand Firm-Video. Twisselmann wrote several books on JW and runs the website http://www.bruderdienst.de
I was present at an occasion when this speech was given by Wrobel and he seemed to feel uncomfortable when mentioning the name but mention he did. The talk was also printed in the German edition of the book "Persecution and Resistance of Jehovah's Witnesses During the Nazi Regime 1933-1945" ( http://www.edition-temmen.de).
The WTS bought hundreds of the book to donate it to libraries and VIPs.
There Twisselmann is quoted in a footnote on page 372 calling the Stand Firm-Video "a professionally made documentary" and a "propaganda movie". Twisselmann quoted by Wrobel is similar to find a quote from Randy Waters in a talk by Pellechia.
There is also a German book on the Kusserow family written by Hans-Werner Kusserow. This book has also been advertised by the WTS at exhibitions. In the foreword, the authors states that he used to be a JW but that he now has a neutral status while he is neither DA nor DF.
I strikes me that the WTS makes good use of inactive ones and even publicly quotes apostates.