The fear of "outsiders", "apostates", "worldliness" and "sinners" has been institutionalized by Watchtower HQ because of their own fears of the outside world. What can you expect from a marginalized cult?
It seemed to ramp up a bit in the 70s about anyone appearing to not believe the world would end in 1975. Home buyers, college attenders, pregnancies, business starters. All were subjects of negative gossip as faithless and materialistic.
Around 1980 "apostates" secretly following Ray Franz were feared.
Attractive single sisters are frequent targets as possible "husband stealers".
It's always something.