The situation, the language and the excuses given are very familiar to ex-JW's.
The rule, which the Church denies having, allegedly bans all Scientologists from any contact with ex-members who criticize the organization.
Its spokeswoman cast doubt on the claims made in Miscavige-Hill's book.
"Those who decide a religious order isn't for them are free to move on with their lives, as Ms. Hill did. Every religion has its detractors; there is no faith that can satisfy everyone's spiritual needs," she said.
"Revisionist histories are typical of apostate behavior and tabloid tales should always be taken with an enormous grain of salt."
Protected in the United States by the US Constitution, which guarantees freedom of religion, the Church of Scientology is considered a sect in other countries.