As pirate as well as trader i do agree that pirates act sometimes very out of RP...Naturally, traders are no better...
I have that privilege that one of my ships wears terrorist ID so i do have somewhat bigger freedom of choosing how i will act if trader doesn't stop after my i tell him too...However i very rarely kill without money or cargo demand...
But i base large portion of my decision what my next move will be on traders reaction...if he is willing to RP with me i will treat him with respect but he will know who is the boss...if i get only NO, or suck it or something along those lines...well then...i will most probably ignore him (after i kill him:crazy:)
I do the same with pirates as trader...if their first words show good RP i will stop and after nice little chat with them i will pay money they ask...if i get 2 mill or die message..only answer they will get is my 6 turrets firing back at them...
Whole point of my blabbering above is; we need to treat each other with respect and keep in RP ALL the time...it takes two to tango (or RP in this case)