I'm a Corsair pirate and I've come across this dilemma many times.
Let's say I'm at New Berlin.
A trader undocks, full of cargo.
I tax him, he refuses and runs.
I kill him.
He undocks takes cargo and leaves.
What am I supposed to do??? Is he allowed to do that? According to PVP rules, he's not allowed to undock for 4 hours, but the rules also say that it's OK if he leaves the system...
My instinct tells me I should kill him, but then does that count as reengagement? If he's allowed to simply respawn and carry on trading that completely kills any reason for him to pay me...