If you read these allegations and are wondering about their accuracy then you should read this: Mark "Marty" Rathbun.
If you wonder about the reliability of ex-members and what they have to say about their former religion (and this doesn't just apply to Scientology - witness the havoc caused by ex-members of Opus Dei and how Dan Brown used their outrageous allegations in his book, "The Da Vinci Code") then you should read what sociologists have to say about these "apostates":
- The Reliability of Apostate Testimony About New Religious Movements
- Apostates and New Religious Movements
A telling paragraph from the second article:
Neither the objective sociological researcher nor the court of law can readily regard the apostate as a creditable or reliable source of evidence. He must always be seen as one whose personal history predisposes him to bias with respect to both his previous religious commitment and affiliations, the suspicion must arise that he acts from a personal motivation to vindicate himself and to regain his self-esteem, by showing himself to have been first a victim but subsequently to have become a redeemed crusader. As various instances have indicated, he is likely to be suggestible and ready to enlarge or embellish his grievances to satisfy that species of journalist whose interest is more in sensational copy than in a objective statement of the truth.-