But rules aren't made by those players. Rules are made by FD, and for sandbox, they should be balanced and make sense. Identification is clearly a plus for PVPer, removing it just tips balance to the center - after all, if you clearly see I am human pilot (and despite how good NPCs will be, you will be able to tell after 20 - 30 secs), and you are more skilled than I, you will take me down in a matter of minutes. Also no id works for PVPer favor, as I as potential victim should be at my guard all the times.
I have seen this on both sides of aisles - both with claiming that being killed by human pilot is not the same as by NPC, and also claiming that PVPers want interact "only with humans". And frankly, I don't understand this, because it's boring, and due of sheer size of the game you won't meet lot of human pilots anyway. I want FD to try something new, and no id is good start. I will guess we will see this tried and tweaked during beta. Of course, NPC AI should be more than good then.