I know the Festival of Giving is almost at an end but... in our crew we have a tradition that I'm pretty sure a lot of crews have too: at the end of the session we burn the ship...
No... wait, it's the other tradition that I was meant to talk about... we fill any supply crates (ones we can't sell) we've gathered and leave them on the docks for others to pick up and use.
As we were doing this last night I suggested it would be cool if we could leave a note on it with some pre-written pirate speak greeting and signed with our crew's gamertags.
Maybe if a crew does use it they could inspect the note and optionally "reply" with a thank you. This could then pop up the next time we log into the game.
You'd get nothing for it, I'd expect nothing. but it could go some way to helping foster a less-salty community and generate some good vibes.