Other plugins log warnings when they meet a fake connection. They go looking for things a real connection has and a bot does not.
console-filter: true in config.yml mutes that noise. It covers nLogin, ViaVersion, ProAntiTab and ModelEngine.
Each mute is only installed if that plugin is actually running. A filter that cannot be needed can only ever hide something real, so it does not get installed at all.
Set it to false if you would rather see everything.
Picked up automatically when it is installed.
Bots get re-listed for each player as they log in, so they show up properly once someone is through the login screen.
nLogin also tries to kick fake connections, for a missing session and a few other reasons. Those kicks get swallowed, along with some other kick reasons that would drop bots for no good reason.
Needed for the vote feature, either Votifier or NuVotifier. Nothing else uses it.
Hooked automatically if it is installed.
The plugin runs without any of the above. They are all optional, and none of them are required for fake players to work.