If you knew there was a rabid animal loose, whether you had been affected or not, would you warn others against getting near the animal? Would you arm them with as complete a description as possible for the marking and behaviors of the animal, so they could accurately identify it?
One thing I do is inform people about the sly tactics used by the borg to hook you into getting involved with them. I have also told a person who has studied off and on for 10 years to read Crisis of Conscience. Once she did, she said she is through with them for good. She also told her "good friend" and friend's husband about the book and how true it was. Now that "good friend" doesn't bother much with her.
I also think Danny has the right idea about information disemination. We need to see more negative media reports on how the WT supresses others from enjoying the same freedoms they fought in court for. The coin that the WT flips doesn't have heads and tails anymore. It is the same on both sides. They don't recognize any other comments or opinions.