Could be an interesting idea to implement a player bounty system similar to the Order of Souls voyages that have you hunting skeleton captains.
Could work something like this: once a player within the server gets X number of kills of other human players within a certain time period (maybe 3 or 5 kills) that their last known position is broadcast (e.g last seen near Crescent Isle) periodically.
Other players could go about hunting these pirates down if they so choose, and are rewarded with a gold payout if they are successful.
Could be abused theoretically, but I am sure systems could be put in place to reduce that.
Thoughts?