In a protocol designed to be resistant to censorship, the capacity for users/entities to selectively associate or disassociate with each other does not undermine the protocol's resistance to censorship. Instead, this flexibility, including the freedom to avoid interactions with certain users or use cases, is a fundamental aspect that reinforces the protocol's censorship-resistant nature.
Users/entities exercising this optionality is as much an attack on the underlying protocol as roads are an attack on the automobile.