When I was a teenager (in the 70's, see 1974 WT info) shunning df'd people was not as rigid, unless you were still practicing the sin or someone might see you. The elders would be chatting with the person at the KH not like today where only an elder on the JC could have minimal conversation re getting publications etc.
But then the "rules" changed in 1981 (during the 1981 great WT "apostasy") and people were threatened with being df'd if THEY associated with a jw family member (other than immediate like spouse or minor children) or a non-family df'd jw.
One may have hoped that the draconian system of disfellowshipping may have eased over the years, yet the opposite is true. In 1974 there was a softening of the 1952 stance, with release of the following article, but this was short lived;
"Congregational elders, as well as individual members of a congregation, therefore, ought to guard against developing an attitude approaching that which some Jewish rabbinical writers fomented toward Gentiles in viewing them as virtual enemies. It is right to hate the wrong committed by the disfellowshiped one, but it is not right to hate the person nor is it right to treat such ones in an inhumane way. We may note, too, that at 1 Corinthians 5:11 the apostle warns against mixing in company with one who "is" a fornicator or practicer of some other kind of serious wrongdoing. What, however, of the one who has been disfellowshiped for being that kind of person but who thereafter, either at an early point or at a later point in time, gives consistent evidence of discontinuing such wrong practice, stopping it? Can it be said that he or she still "is" a fornicator or whatever type of wrongdoer such a one was that caused him or her to be as "leaven" toward the congregation? For example, a young person disfellowshiped for fornication may thereafter marry, raise a family and live a respectable life. Or one who was disfellowshiped for drunkenness may abandon such practice and, if drinking at all, may do so in moderation only. By such changes these individuals may now regain the respect of the community. Such ones may not yet have come and formally sought reinstatement by the congregation. Is there, however, not an evident difference between these and others who continue right on in the wrongdoing that brought their disfellowshiping? Those giving up the wrong practice may still manifest some appreciation for Christian truth, perhaps even defending the true Christian congregation when someone speaks evil against it. Should not such circumstances be given due weight and have an effect on our attitude as a congregation toward such ones? Surely if the prodigal son of the parable had returned home in a drunken state, perhaps dragging along one of his harlot companions, the father's reaction would not have been the same. But the father had reason to believe that the son was approaching with a right motive and, rather than suspect the worst, the father hoped the best and went out to meet his errant son." Watchtower 1974 Aug 1 pp.467-469
Unfortunately, this more reasonable stance reverted back to strict shunning in 1981, with a comprehensive discussion in the Watchtower Sep 15. The 2008 book Keep Yourself in God's Love continues to refer to the 1981 Watchtower as the standard to be followed.
http://www.jwfacts.com/watchtower/disfellowship-shunning.php