The problem is it takes time to identify them and kick them out. At a large scale, there will be a constant churn of poorly managed and malicious instances getting access to the network and then not getting booted until weeks or months later.
Addendum: Yes we know that you think ml/hexbear/grad are tankies and or .world are a bunch of liberals but it gets old quickly. Try and come up with new material.
The problem is it takes time to identify them and kick them out. At a large scale, there will be a constant churn of poorly managed and malicious instances getting access to the network and then not getting booted until weeks or months later.