For thematic and useful reasons I would like for us to be able to bury our own treasures. The mechanic should be fun for pirates that wants to hide treasure for a later day and for pirates that want to discover and steal other pirates booty.
The idea goes like this. You alt click (several times) with your shovel a suitable location to create a big hole. You can now drop a number of treasures (chests, goods & skulls) but not live stock in to the hole. By selecting the option to cover the ground is smoothed out and each member of the crew get a treasure map to the location. The ground shows signs of disturbance (on this server only) so other may dig it up if they try for an hour or so.
Each crew members keeps their map between sessions until the treasure is dug up, but the catch is that a copy of the map goes into a queue and can now be found by everybody as a message in a bottle map on any server. As soon as it has been dug up then all copies of that treasure either turns blank or will only contain a cast away chest.
Players can use this to save their "progress" in a thematic way that won't disrupt the PVP element and generous pirates can hide huge treasures for other players to find and you can show the map to other players as per usual. This means that a found map can now lead to a huge jackpot or a castaway chest.
When you die by the hand of a player you drop a copy of the map.
I also like the 15 men on dead mans chest aspect that if you bury a treasure together with a crew you do not fully trust you don't know if they will dig it up without you.
You can also use the map in a trade: showing/dropping the map in trade for help in an event or for buying a ship.
