Dark matter IS matter, it exists in this physical realm. We know it's there, which is proof enough that it is part of this universe, not some alternate reality.
Freelancer doesn't take known science and contradict it, apart from with some game mechanics. (Planet sizes etc)
It develops upon it.
This, contradicts it and really there is no scientific credibility with it.
It's just an attempt to get a fantasy based group into a non-fantasy based universe.
The very simple solution is to say that you aren't actually ghosts but are just using the tactic to scare your enemies. That would solve all your issues and your group might actually be accepted by the community then, instead of flamed to pieces.
