The difference is that the emergency services have a level of credibility the JWs don't. If a police officer showed up at my door in the scenario you describe, sure, I'd listen. If some random person I didn't know? I'd ask for at least a little supporting evidence first.
Fair enough, but the things is.....people will always be stumbled by the appearance of the messenger. What if the person at the door was a disheveled homeless man who was one of many who had volunteered to help the ESP to warn people of an approaching disaster because they needed more helping hands? Who would take him seriously? But, does his appearance change the urgency of the message?
Even if he had a hastily hand-written authorization card around his neck stating that he was part of a ES volunteer program, would you then trust his message? Aren't appearances how we judge people?
I saw an experiment once where a man was dressed as a homeless person and pretended to collapse in the street, just to see how many people would stop to help him. Almost every person walked by without paying much attention. Then they dressed the same man in a suit and tie and when he collapsed in the street, lots of people came running to help him. Whether we like it or not, we all judge by appearances....or by what we have been told about certain people.
The Bible uses the example of Noah. He had a life saving message for the people of his day and it was met with ridicule and derision.....all they saw was a religious "nutter" building an enormous structure in a huge section of cleared land, nowhere near water, predicting that a global flood would wipe out all life outside of that structure. How likely would it be that people would believe him? His lifestyle was completely the opposite of the one they were living, and he informed them that the violence and wickedness of that world was about to come to an end. They carried on regardless.
It took Noah and his family decades to build that "ark" and to stock it ready for the survival of all on board.....and the more time went on with no flood happening, the more ridicule he received. But once the rain started to fall, and kept falling in torrents to the point where there was inundation to the highest points in their land, what do you imagine might have been going through their minds as they were swept away, trying to keep their heads above water?......have you seen the power of a flash flood?
Whether seen as literal or not, what is the lesson? Do people have to be in water over their heads before they believe someone who tried to warn them about a flood?
If that's your attitude toward injustice, why the OP?
It was just to see how people reacted. It is interesting how a subject like that divides people on the subject of injustice. Its also interesting to see how prejudice alters perceptions of how fair an action is.
Sometimes in matters of political injustice, public opinion can sway governments to ease up a bit if they want to win the next election. All we ask is for the freedom to practice our faith as peaceful, law-abiding people. How are we a threat to any government as politically neutral, unarmed non-violent citizens, who pay their taxes and who are now being punished for it at the behest of a corrupt religious body manipulating their government? Isn't that exactly what the Jews did with Jesus?