I found this video I made few months ago while OPG still lived. I hope text is good enough to understand because it covers some things you shouldn't do while trading.
Afk while trading is a bad idea.
When faced by two pirates who didn't blow you up yet, surrendering might be a cool thing to do.
Talking about your Rogue / OC / Corsair characters that are pirate's brother do not work either.
Docking on the base of the guy chasing you isn't a smart thing to do as well.
As for Pirates, this sheds some light on cargo piracy and perhaps offers a chance to see how to behave with all the things listed above. Once someone has done something wrong, the worst you can do is forget about him. He docks at your base? Lure him out. If you want, you can report him later, but the point is that you get what you wanted.
Shooting afk traders is something you either do, or don't. Depends on situation. But the way that guy ran, I swear I'ld kill him now in Cambridge.
Either way, if text is readable, you might get some insight in corsair piracy, some roleplay, talking smack in group chat, and realizing where did my money come from.
Thanks.