The registrar should ignore reports of abuse, especially if coming from an authoritative source with vast resources that's been collecting reports on its own?

No.

The source should be more careful. It's the equivalent of a renowned newspaper printing warning a restaurant being unsafe to visit. Should the customers' willingness to visit be magically decoupled from this opinion?

It's like a renowned newspaper saying the restaurant is unsafe, and then also the restaurant's landlord taking it at face value and locking the doors without further investigation. Both can be wrong.

> The registrar should ignore reports of abuse, especially if coming from an authoritative source with vast resources that's been collecting reports on its own?

I'm not saying they should "ignore" reports of abuse but treat them as they are -- reports. They can then perform their own independent investigation.

That may well have happened here. I suspect the author isn't telling us something.