That was the parent comment's point. My point is that there are trade-offs. You make the network less vulnerable to that particular attack, and open up other vu

That was the parent comment's point. My point is that there are trade-offs. You make the network less vulnerable to that particular attack, and open up other vulnerabilities instead. Anonymous communication service design is full of such trade-offs. There's a theory that intelligence agencies control many relays. I've haven't seen evidence of it. Tor does its best to be secure even when it can't trust the relays.