@Pete Zahut, that's the nice thing about having disassociated from the Watchtower for conscientious reasons;
I wasn't thinking about the folks at the Watchtower seeing your post. I was thinking in terms of general security and privacy. At the risk of sounding paranoid, when it comes to posting personal information on the internet, less is more, especially so since I'm guessing your brother didn't give you permission to post his name and his location on the internet, nor would it help your relationship if he were to find out you have done so.
I got the impression that you didn't like the fact that he is shunning you. If it were me, and I had written a letter to my brother trying to point out the ironies of his decision to shun me, I wouldn't post the letter and include both of our names, States and Cities on a public forum where it will live in cyberspace for all eternity.
When it comes to the internet, it's a small world and it would be easy enough for anyone reading your post, to find him and tip him off, even years from now. That alone could ruin all of the good the letter may have done. If I were you, I'd ask the forums moderator to edit your names and locations, off the letter.