I request (And REALLY request) a way to tell who on the player list is op and who isn't.
Any way to be able to tell would be lovely.
Be it a color change in their name, or even a little emblem.
All I know is random people keep appearing in our server and deopping and banning everyone without us ever being able to tell who it was.
At the bare minimum it would be useful if an OP's name changed color or displayed when they used an admin feature so rogue OP's could be caught and so that people would be able to identify if an op user was acutally policing or simply preoccupied digging and thus not a dependable protection force against griefers.
An ability for the server admin to leave a standing message though would probably be best as it could include the names of the OPs he assigned and trusts thus notifying you of who to go to for help as well as preventing operators from having to be suspicious of people on their side.