I know there was a watchtower mag last year
I'm not sure which one you are referring to but the Watchtower 1985 July 15 Questions From Readers covers the question:
?Did2John10,which says not to receive into one’s home or to greet certain ones, refer only to those who had promoted false doctrine?
and dealt heavily with how to deal with those who disassociate themselves due to now disagreeing with doctrine. Let me know if you want me to PM you the article if you don't have the CD.