I'd like a distress call system.
Even though, PvP battles can be quite short.
If would be nice to atleast attempt to help.
I think 500ls is enough range.
Balanced enough to be missed, but no so short you'd be better of winning the lottery.
Or varied depending on your current SC speed.
Would add all sorts of cool mechanics to ED.
Pirates may think twice about attacking in a busy system. Or, they may lure unsuspecting 'wannabe heros' in to a trap.
It would need a buff to the drop range, like with Wing beacons. Otherwise it'll take too long to get there.
It could be set to auto activate on any aggression, or just player aggression, or manual/off.
It should also say "Distress Beacon: CMDR NameHere" in the nav panel and HUD.
So you can learn to recognise the traps.
And show in a brighter color, and maybe even alert you, like "Distress call detected!"