As things currently stand, Rankings give people a great deal of advantageous meta-game information that their characters simply would not have access to within the context of the game world.
Rankings seamonsters for example tells people within a few small areas exactly where a ship is at any given time. Rankings mining (playername) can tell them that a particular player has active mines and sometimes even allow them to make educated guesses about the troop/miner ratios. Even ranking Fishing tells you that certain people are out on the water, regardless of gems, veils and com screens.
While I would love an opt-out option to this purely OOC scoreboard, I realize that will probably not be allowed. So instead I propose that the information for these things be updated only at Seranade each day, or better yet at random intervals every couple days, instead of having it be a more or less a tick for tick counter that eliminates the need to search out enemies.