that's a crap consensus and what the fuck about the node can create their own rules and it can even ignore the rules that have already applied to the blockchain. What about when there was a node who refuse to create a connection from one to each other. This proof of honesty needs more research. The blockchain rules that were there caused by it will be a very important thing to create agreement between all of the nodes. Imagine when there was a blockchain that agreed to upgrade its client to the latest client but there were a lot of nodes who will be ignored it and then the blockchain itself will fail.