/track (player)
As soon as you type this, it will show everything the player does, from adding and destroying blocks to typing invalid/valid commands. I have some ideas as to what the command could show.
Blocks added: Single command = /tba (player)
Info will be shown as: (player) placed (block)
When you type this, it will bring up a list every 3 seconds (until your turn the command off) showing the blocks he/she places when you type the command.
Blocks destroyed: Single command = /tbd (player)
Info will be shown as: (player) destroyed (block)
When you type this, it will bring up a list every 3 seconds (until your turn the command off) showing the blocks he/she destroys when you type the command.
Valid/Invalid commands: Single command = /tvic (player)
Info will be shown as: (player) typed or tried to type (command)
When you type this, it will bring up a list every 3 seconds (until your turn the command off) showing the commands he/she types despite if the command is valid or not when you type the command.
Which world he is in: Single command = /tl (player)
Info will be shown as: (player) is in (world)
When you type this, it will bring up a list every 3 seconds (until your turn the command off) showing which world he/she is in when you the command.
Notes:
By typing the same code again, it will turn the tracking off. You can type several of the single commands, just to see the ones info you want displayed.
By typing /tracking_off, it will turn off all the tracking commands you have running.
I advise that if this command be put in place, it shall only be accessible if your ranked HOP+
I also advise that if this command be put in place, you should also think of other ideas since i only gave some basic ideas that you probably would have though of