Look at it from the PPRuNe owners' perspective.
They provide a free service, but that does not include putting themselves at risk of legal action by people posting anonymously.
If people wish to post allegations that could be libellous, they are required to provide a verifiable name and address, and information supporting their allegation.
Moderators are required to enforce that rule.
The PPRuNe owners then decide whether to allow the post.
We know from experience that allegations by newly-registered usernames need to be treated with even more caution.
Also, as in this thread, it is often one person using a number of different usernames.
I've removed some posts in an attempt to avoid the thread being closed. If people persist, the thread will inevitably be closed or removed by PPRuNe Admin.
Think before you post.
Heliport