When one player kills many, at different distances, this can be considered a cheater in the game.
Players won't be too upset if the server shuts down at this point, the suspected player is banned, and their items and position are returned

The same can be done with the loss of machines at low server FPS

Ideally, do this without server restarts.
If a suspicious situation arises, the game must save the honest player, tell him about what happened and correct the consequences