Would love to give good simple wording to the anonymous DA intro, that projects the reality of it, but also simply states the anonymity.
Like
I am baptized as one of Jehovah's Witnesses, and because of this, I am acknowledged by you to be one of Jehovah's Witnesses. I am sending this to you today to let you know I NO LONGER AM ONE OF JEHOVAH"S WITNESSES. I want to tell you my name, but you have censored me by the implication of your shunning policy. So know that when I meet someone I do NOT tell them I am one of Jehovah's Witnesses, I think and act freely of your influence in most aspects of my life. I speak out against your mistreatment of your members. And if someone else is waking up as I am, I am there helping them. But you do not get to know my name, and you do NOT get to remove me from your congregation not because I choose to stay, but because of your intolerant policies.