Stupid brig just made me lose shrouded ghost

I had JUST spawned in. I grabbed some basic supplies from the outpost and was gonna do hourglass. As I'm raising anchor, an unnamed brig rolls up on me and starts shooting me. I start running away so I can dive to my fight. They turn around to chase me. I'm running and running for a good 15-20 minutes when I see it. The Shrouded Ghost. I raise sails and turn to start fighting it. I tell them what that is, and they just keep shooting me. 2 of them board my ship, I manage to kill them both, but then I died to fire. On the Ferry, I explained to them what the shark is and how rare it is. They didn't answer me, and when I respawned, they kept shooting me. Eventually the Meg despawned as they kept shooting at me. Fucking idiots. I have almost 600 hours in the game and that's the first time I've ever even seen it. I'm so upset right now.