I didn't like the idea of an automatic identifier when some low karma CMDR shows up on radar. What am I? A psychic Yoda sensing a disturbance in the karma?
Well, that's just the sort of thing the karma term implies and what separates it from the crime & punishment system.
It's arbitrary, surrealistic, and immersion defying. However, since no one can be bothered to make a setting that has actual, plausible, cause and effect--either because this could remove the gravy train of fan service from the willfully ignorant, perpetually incompetent, risk adverse, and cheat prone player base, or because it's just too much work-- it's what were likely to get, in some form or another.
For this to happen the CMDR should have recently misbehaved in that system, like going on murdersprees (NPCs from the faction controlling that system + clean PCs). The system authority's security vessels patrol the area, scanning arrivals, relaying this information to the station, who inform the present CMDRs in that system of the nasty CMDR.
This sort of thing would be part of crime & punishment, not the karma stuff everyone is talking about. An early warning system based on karma would reveal 'misdeeds' from the other side of the bubble, or even those which have utterly no in game explanation at all (cheating or an utterly atrocious connection).
The added advantage is that during CGs, when those who went to the dark side have been shooting down anything that moves for quite some time are identified to those who are participating in the CG.
This already happens when they turn red for shooting me in the back!
[video=youtube;zfby-LA5GGQ]https://www.youtube.com/watch?v=zfby-LA5GGQ[/video]
And now that I know that particular CMDR is hostile, I'm prepared any time I see that name in the CMDR log (which seems to have been silently changed to only reveal those that are actually within, or near, sensor range, which is nice).