that's part of why I posted the suggestion for a station bulletin board too - as a means for players to reach out and say "okay, obviously there's other players here but we haven't met in person due to different times/modes/whatever - let's talk and work something out"
alternatively make demands if you've got the muscle to back them up
That's a good idea in it's own right.
I guess the hardest part might be "policing" the content of messages but it'd go a long way to making the game seem more "lived-in" - as well as serving the purpose it's actually intended for.
One thing that's always disappointed me about ED (if only slightly) is the lack of evidence of human habitation.
Ideally, I'd like to see the debris of wrecked spaceships and SRVs left floating around for, say, a month or so and specific things remaining
permanently.
In KSP, for example, whenever you land on a planet you can plant a flag
and a small plaque on the ground with a short bit of text on it.
Obviously that's a single-player game and creating this sort of stuff to be persistent in a multi-player game is a totally different ballgame but it'd be nice if there was more evidence that other humans had been around before you.
I like it when I find exploded DC 'roids in a hotspot because it's one of the only "natural" indications of another human's presence.