NRDS (Not Red Don’t Shoot) is a playstyle where you only shoot those who are marked red to your alliance.
Best explained by its creator, basically if your neighbor moves in and waves so you wave back and say hello. If your neighbor moves in and kicks your dog, you don’t hesitate to shoot them in the face. You just don’t engage the innocent people around you. You answer only hostility with hostility.
This is civilized game play in an uncivilized universe. This is Eve on hard mode.
Listen to a historical audio recording of Aralis, founder of Curatores Veritatis Alliance [CVA] speaking on NRDS during an Eve University lecture:
Provibloc loosely defines NRDS as not shooting anyone first unless they are listed as KOS.
Most alliances will mark the major hostiles red so that their members only need see a red approaching to know that they are a legal target to engage.
Sometimes you must look up an unmarked pilot to establish if they can be engaged. If you are shot by anyone, you always have the right to defend yourself.
NRDS communities generally discourage dishonest game play including scamming and other forms of poor business or personal conduct.