This can already be avoided via making said minigame default though the Default Minigame mod. Only Admins can leave the defaulted minigame.
This would only be useful to stop badmins from cheating while host is away.
That is incorrect.
2 different situations where this is useful:
- A user disconnects from the server, then joins it again.
- A user connects to the server and the minigame is already running.
In both circumstances, they will be spawned into the minigame - unfairly, I might add, because some people have already lost their lives.