"Did you know most people do not like it when you ask for their admin password?"
Here would be a fun one, only displayed if they have reached the datablock limit last time they ran a server(checked after the server started, and saved to a $pref) Â sorta as an easter egg.
"Did you know you have waaaaay too many add-ons?"
"Did you know you look more intellegent if you paint your bricks as you build?"
These ones tie in with the admin one.
"Did you know you shouldn't ask to load a save upon connecting, regardless of how good it is?"
"Did you know the ability to use f8/f7 is no reason to ask for admin?"
Here's one that should be removed from the players list the first time they visit the controls section of the options menu.
"Did you know you can configure your controls to your liking?"
"Did you know Blockland is doing nothing for world hunger?"