Helilog56
Your caution to others is unnecessary. Take a look at the "privacy" notice at the head of the forum.
If people are posting factually accurate material then they are OK. If the material they post is not accurate and amounts to defamation then there is no "anonymity" for the poster.
If you have not so far read it, the notice says:
"NOTICE: You are responsible for the content you post. This is a public forum. Treat it as if you are speaking in a crowded room. Recent high-profile defamation events illustrate that there are ways in which third parties can force personal data, including contents of personal messages, to be released by bulletin board owners. Be careful - libelous/defamatory posts can and have landed members in legal hot water. PPRuNe will not guarantee your anonymity in such situations."