No one said anything about stopping someone trying to contribute a relay/node. However, do you understand how the 9 directory servers work and how they alone choose the circuits? Thereby, being able to drop your relays/nodes, if they wanted? They've already done it before with relays they deemed malicious/unwanted. My comments weren't even about that part, but at an even higher-level of the Tor network, which is the brain of the network (the directory servers).