Fox,
would I get you to defend us in court on the basis of your definition? No chance. Look up libel and slander and, while you're at it, check out the legal liabilities of those who publish anonymous bulletin boards. If, after that, you are still wondering why we are sensitive to this sort of thing then you are less intelligent than I'm still prepared to give you credit for.
Let me put it simply: if you anonymously say, or imply, 'I think Wonder Planes Aviation is on dodgy ground' on this board, without including justification, it is legally Danny Fyne and the rest of us moderators that are liable if in fact that company is in good health and takes exception to any suggestion otherwise on Pprune.
As we all run Pprune in our spare time from professional aviation, and without payment, we are naturally keen to avoid anything which might have severe financial consequences for us and our families.
Of course you, under your cloak of anonimity, run no such risk. That is why we insist that any posters of potentially damaging, slanderous, or libellous 'rumour' provide us with both their real identities and contact details and the source of the rumour. You are, of course, aware of this, as you signed up to the rules of this site when you joined.
Like I say, you are not at liberty (in any walk of life) to say what you like about who you like. Responsibility is a heavy burden, and we aren't shouldering it alone.