I think that two seperate issues are being confused and need to be seperated. The concept of "shunning" as defined in WT theology, is foreign to the NT. That much is certain. Even the WT article that first promulgated the idea, back in 1981, admitted that the procedure developed from the more severe restrictions placed on the Jewish idea of identity, and expounded by the Pharisees and certainly not from the Person who taught the Parable of The Good Samaritan.
However, having said that, it must be admitted that every community of believers, whether social such as a primary school, or theological, such as a church is responsible for safeguarding the moral rectitude of its fellowship. In this instance, the matter of church discipline becomes important. Morality is a prime feature of the Christian faith. It claims to worship the God who IS love, and who has revealed His concern for the sanctity of moral codes of conduct among His worshippers.
Those persisting in violating the high moral standards expected of all, must be dealt with. Effectively. There can be no pussy footing around. And the local overseers, entrusted with the task of protecting the flock, must have a Scriptural basis for exacting divine standards.
Although it is true that no one is saved by his conduct, nor is anyone perfect, it is still expected that all believers would lovingly and freely subscribe to a sense of morality befitting the name of Christ. Persistant defiance of these standards must, inevitably bring divine retribution. The catalogue of sins mentioned in 1 Cor 5:11 clearly testify to the church's outlook on morals. Six are mentioned. Immorality,[ NO CHILD MOLESTORS HAVE ANY PLACE IN A CHURCH COMMUNITY!!! ] covetousness, idolatory, profanity, [both JFR and NHK were well known for their use of bad language, including the ''F'' word] alchoholism [enough said about JFR], and fraud.
If you were a parent with young children, your concern will be the protection that the local church accords them Being exposed to lewdness or profanity is not something to be contemplated. All must understand that there is a line that must never be crossed. Notice however, that the concern of 1 Cor 5:11 is morality, not doctrinal conformity. There is no excuse for imposing a uniform concensus of belief on all members in this passage. Nor is there an indication that such discipline was to be administered in such a way that familial relationships were to be distorted, simply to conform to the doctrinal imposition of a secretive leadership.
The ministry of the church is designed to lead the fallen one to a conviction of sin, and repentance.
It is the sad failure of the WTS to see the real thrust of this passage. In fact only very litte attention is given to moralirty in the WT conception of shunning. By far doctrinal probity is much more in demand. Anyone disagreeing with the anonymous leadership, even in the most trivial of ways is made to feel the pressure of shunning. In fact the latest trend in WT circles to secretly conclude child molestation cases with its accusers is ample proof that the WTS places theological conformity above immoral practices. It seems the leadership will protect you for being a child molester, as long as you subscribe to their unfettered authority. In this way they have grossly misrepresented what Paul was striving to maintain in his letter to the Corinthians.
In fact in my own case, my disassociation with the hedonistic leadership of the WTS was brought about by the shunning of several members of our congregation on the somwhat dubious grounds of "spiritual fornication" whatever that may have meant, when in fact their moral code was perceptably higher than the average member.
So yes - it is scriptural to discipline violators of the Christian code of morality, but whether that includes the WT concept of "shunning", especially within family circles, is much open to question. In fact the legacy of this monstrous practice, as seen in the misery created, the psychological damage perpertrated, and the consequent ruin in human relationships, simply to uphold the unwarrented authority of a deceptive leadership, is damning evidence that it is not scriptural.
Cheers