They used to have all these stories about how in war time, the brothers and sisters had to hide information. One story went that a sheet of paper that listed where the other witnesses were, was left out in plain sight and yet the soldiers missed it entirely!
The WT has to add side stories to fuel the imaginations of the regulars. Oh how dangerous but courageous of that couple to collect that info. Certainly, that also shows that the WT is keeping track of it's poor sheep and cares what happens to them.
But if it is the Great Tribulation, what is that really going to accomplish? Can the couple count time for that? Isn't that setting them up to have to be tortured to get that info? (which is what the WT wants people to think about) Do they expect the GTrib to last for years? Will the next bunker episode see the bunkees hooking up to next door to get power for their ipads so they could read the Watchtower? After all, Man cannot live on the Bible alone but needs to have the Watchtower to keep their spirituality intact.
It also helps to make a stronger line between "us" and them "worldly" people. Remember the old Revelation picture of the rebellious people that were going to be destroyed at the end of the 1,000 year reign? They all deserved to die and get out of the way of others so they could enjoy paradise. They had necktie headbands. They've been replaced with the police swat team who are scarier.