On your center display (the round thing that tells you whats around you) the NPCs are solid and People (Cmdrs) are outlines. And while you're looking to see if they are real or not, they're interdicting you.
If you target them so the computer does some kind if scan, do both npc and human players appear as CMDR something?
I didn't notice the outline/solid blocks before so glad of this thread. Will look out next time I'm able to play.