Sure, this has come up before, and Alex has decided against it for the foreseeable future for very practical reasons. But there's still no reason for posts like:
It shouldn't be needed, really. The FAQ clearly states that there never will be any multiplayer. I'm getting stick of all these threads. There are 15 of them now. Perhaps people needed to learn to use the damn search function.
15.
If you're sick of it, it's perfectly fine to not post in the thread: nothing's obligating you to do so. I found the Starfarer community to be very welcoming and productive when I first visited, but posts like these in an increasing number of suggestion threads just have me shaking my head and feeling less and less inclined to continue visiting.
And to address the OP, Alex has ruled out multiplayer for two major reasons: gearing the game for multiplayer would skew his vision of Starfarer, and the network code would take a tremendous amount of time to get right, time that he would rather invest in developing the single player campaign.