So we have an interesting issue.
we have the server restarting every 4 hours to avoid some memmory leaks, and make sure things a re flowing and do a backup etc.

we would like to be able to kick or ban all the players with a message during this time.
the reason being that just as the server is shutting down. there is a dupe bug.

if you time it right, since mods and inventories seem to save BEFORE the player inventory.
a player can remove a bunch of materials an me system or the like, and have them both in inventory and in the me system after restart.

as such i was hoping essentials could offer a command to help with this.

So basically you want a "kick/ban all players in X duration" command?

yes pretty much. (that will keep alive after server reboot)

You can do something like this with the new /delayedaction command.