This is such a great idea!
After reading the PR, there is one thing that is not clear to me: how can you ensure an swarm of bad servers are not trying to DDOS a remote server? If a bunch of servers create fake users, and some fake super users who everyone follows, then the act of moving those super accounts is O(3) jobs for every follower the super user has (as it says in the PR)
Wouldn't this attack be easily exploitable? Are there any other tools to prevent these kinds of attacks? (apart from baning server domains)