I suggest adding a configurable suffix to the end of the "Left while frozen" message, that when clicked will run the "Left while frozen" commands in the config. Just in case I give permission for a player to leave, and don't want them automatically banned.
This would also allow the commands to be ran as the user who clicked it, rather than console.
Added to our in progress update list. Either me or @Thinkverse will most likely add this soon.