I am saying its best to put your efforts in battles that you will either win a real victory or a moral victory.
IE for example A decree was that there would be no more get witholding agunahs for money and it was publically declared that anyone witholding a get creating Agunahs for 5-10 years will be punished. Even if the battle fails There will still be a moral victory.
However one could protest CHilul Shabbos ie and not only not get people to stop chilul Shabbos, but they will get hostile and perhaps declare war on you. How many people have become Shomer Shabbos because people yelled at them driving?