AFAIK moderation/administration doesn't manipulate content like that.
This is a forum, meaning content is provided by the users and as long as its within the lines of the forum rules, there's no moderational involvement needed.
The original post contains nothing but false accusations. I'm not sure that's how things should stay/be. And as moderators of this forum I guess you should strive to keep the forum topics relevant, objective and true. The one we're talking about is nothing but.
By your reasoning I am perfectly allowed to create the topic where I will say things like, "bitcointalk forum is run by wretches and the whole forum is nothing but scammers gathering" and that would be OK, right?Yes that's how this forum works.
Officially you are allowed to accuse anyone of anything, but should provide sufficient proof. In reality people are just saying what they want. You can pick any business that advertises here and start a topic in the service discussion saying it's shit, scam and people should avoid it. I've seen it done by competing businesses like gambling sites, that were using new accounts to start topics meant to discourage people.
On the other hand you have to understand that thoroughly checking each accusation would require a lot of time and effort from staff members. They can't simply delete a thread because you, the business owner, have vouched for it.