It all comes down to whether you carry nomad tech/brains or not. If you do - you will be shot. If not, there is a chance you will be fired upon, for example if you will try to follow Keepers, but you are also given chance to escape, we don't pursue "clean" traders. If Keepers attack station - try not to dock there or you will be shot. We don't ask for tax, nor will we ask you to drop the nomad cargo, even if you do - you will still get shot as you already had them in cargo hold and it's something nomads don't like at all. It's not piracy, it's not terrorism, it's about eliminating those who do harm to nomads. Simply said: if you don't want to get shot on your trader - don't carry nomad cargo/tech, just move along as quick as you can and avoid close contact.