Did they have a DFing recently or did a DF'd person move in?
I am willing to bet that several people in the congregation have not been "obeying" the elders on this.
My experience is that the elders are the ones that disregard this counsel.
A sister worked across the street from one elder and watched him be picked up every day by his DF'd son; sometimes they even went to lunch together.
Another brother sitting next to a DF'd JW at work heard him get a phone call every day from his elder dad.
Then there was the elder and his wife who flew to where their DF'd daughter lived to "help" her out.
Then there was the sister who visited every week at work by her DF'd brother.
Of course, the other elders said this was "necessary family business" when the rank and file JWs inquired about these situations.