As to all the trader-pirate interactions, there's one factor I didn't see mentioned. That is, if a pirate tries to do his thing in the main area of house space, depending on the trader, telling the pirate to just leave makes a ton of sense. For instance, if a GC is pirating a Samura trader in New Tokyo with police patrols all around, even a minor chance of success in a fight makes sense. Why? Because if their ship takes too much damage, they eject and the police will pull them in, but if the pirate has to eject, they're going to prison for a very long time.
All I'm saying is there are many, many variables to consider and thus it's very hard to narrow down the possibilities to a single thread. The only thing consistent is you should make sure to give the other party enough time to respond to your RP.