The server has switched to Juke Alert for snitch blocks.

Juke Alert is an add on for Citadel that lets you create snitches.

Snitches

Snitches are a block that records players entering an area, breaking a block, placing a block, 
placing a water bucket, picking up a water bucket, etc. Snitches are made by creating a Jukebox and placing it.

Alerts

Alerts are a block that sends the owner a message when a player walks in the cuboid around 
the alert block. The alert block is a note block.

How to create an alert or snitch block

Creating an alert or snitch block is fairly easy. All you need to do is place a block and reinforce it.
Everyone belonging to that reinforcement group will be added to the fields and will not show up
on any of them. They will receive messages and can check snitches.

Commands

/ja: Shows information about JukeAlert and possible commands.

/jahelp: Shows all the commands.

/jainfo: Shows info about a snitch.

/jaclear: Clears a snitch.

/jaclearall: Clears all your snitches.

/janame <name>: Sets the name of the snitch.