Want to do Ghost haunting with a sense? How about this:
Get yourself one or two slave liners and roleplay the slaves killed by the captain who dumped them into space and killed them instead of giving up his cargo to officials in a house system.
Now you got a reason... and a pretty weird but logical reason to hunt slavers... you might even liberate the slaves and bring them to stations... where they suddenly would appear in a whisk of mist in the docking bay... while your ships would disappear back into a cloud.
If encountered by anyone else, you can literally play dead... a drifting wreck. If a junker decides to salvage you and come on over... your turn to spook him away.