Lets say I wrote down an anonymous e-mail address in the letter, would I get an answer?
No.
And if I wrote my full name and which cong I belong to, then I probably
would be in trouble huh? Anyone tried this? What happened?
A low-level service department lackey will read your letter, see that it is "apostate", and, without reading any further, forward it to your BOE and "kindly suggest" that they give you "spiritual help" (which is, of course, a trip to the back room with 2 elders to determine just how far-gone apostate you really are).
If it gets forwarded to my boe
It absolutely, positively, 100% certainly will, if you put your name & congregation name in the letter.
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Guys, the WTS gets hundreds if not thousands of letters from disgruntled "apostates" and/or vaguely upset "fringe" JWs every week. They have the process down cold.
1) Low level service department lackey opens your letter
2) Within 30 seconds he will determine if you are "sincere" or are an "apostate"
3) If "apostate", and you are foolish enough to include your name & congregation name, he will send a message to your BOE to investigate your level of apostasy
4) If "apostate" and no identifying information is in the letter, it goes straight to the trash.
5) If "sincere", but the topic is something the WTS would rather not answer, the low-level lackey will send you a form letter encouraging you to "study more", and he will send a copy of the letter to your BOE and tell them to determine just how apostate you are
6) If "sincere", and the topic is not particularly controversial, he'll forward the letter to whichever department can best answer it. That department might possibly answer your letter, more likely won't. But your BOE will still get a copy of your letter encouraging them to sniff you out to see if you are apostate.
Write a letter if it will make you feel better. But realize that yours will merely be one of 10's or 100's of thousands that will have been sent there, and will make absolutely no difference to anyone or anything in Watchtower-world.