This was just mentioned as a side point in another thread, but I thought it deserved its own post.
I think Rare should get rid of all neon sign clouds pointing the direction to ghost ships and skull forts. I love the thrill of sailing along and getting surprised by the megalodon. It would be great to have that same experience with a skeleton ship attacking, or the sudden cannon fire of a live skull fort.
If anything we should hear about recent sightings of ghost ships in the vicinity from the locals at the islands and outposts. Or hear stories from the tavern gossips about strange lights and cannon fire from the nearby fortress at night.
Once you've experienced the event yourself, it appears on your map, but others have to find out about it the same way.
It goes without saying that I feel all upcoming events and quests should be handled the same way. No neon signs.
