At best, internet boards like this are a resource. They aren't the first cause why a person leaves. The first cause is the permission a JW gives themselves to think for themself and determine to consider other viewpoints besides the GB.
Every JWN poster is an individual, and if you think about it, it is individuality that is most offensive to a trained and indoctrinated JW. The underlying message from the GB to those who leave is "You prideful son of Satan, how dare you leave US!"
So whether you try to be nice, or as straightforward to the point of rudeness, it won't matter, to an indoctrinated JW, the point is that you dare left in the first place and spoke your mind, whatever happens to be on your mind.
Real life ain't pretty, and people are people with their own opinions. This board reflects that. We overrate the board if we think some kind of united effort here will actually help JW's to wake up.
Remember, as a JW, you were trained and told how to respond, how to think. Until someone of their own volition allows for the possibility that they can consider the words of other former JW's it doesn't matter what is said. So if you think anger will attract a proportianate amount of JW's, I would disagree. I also think a fair amount of empathy is in order. We were once them, and for a while at least, we believed a lie. So are many who are still in.