Proof of stake does not offer any resistance to Cybil attack or (part time) collusion of stake holders. In the case of such attacks the victims will find thems

Proof of stake does not offer any resistance to Cybil attack or (part time) collusion of stake holders. In the case of such attacks the victims will find themselves in a situation that can be described as "shadow ban" - their transactions are not accepted or accepted too late, etc.