If a pirate is boring and asks for too much without much effort, just legal metagame player list, dock or log off when you see him in the next system next time. Just like pirates use player lists to get you, it's your choice whether you interact with him or not.
You can cry "oh no what horrible thing to say Lemon - avoiding interactions? BAN" but this is exactly what people do. Server pop is really low, systems are big - there's no reason for traders and pirates hating each other.
The Silent thrust traders and 20 million or die pirates is what makes the pirate-trader meta not enjoyable.