It takes quite an effort to become hostile with a minor faction. You need to kill rather a lot of ships, or fail or abandon a lot of missions to get your reputation low enough. So becoming hostile should be an event worth noting.
When you become hostile with a faction, they should send an assassin out to hunt you down. This assassin should be of equal or better combat level to the CMDR and should have a well equipped, even well engineered ship. The assassin should be fairly persistent as well, so if you escape a few times, they should find you later. You should have the motivation to get into your best combat ship to go and meet this assassin.
This shouldn't be about punishing players, but more about creating a challenge.
When you become hostile with a faction, they should send an assassin out to hunt you down. This assassin should be of equal or better combat level to the CMDR and should have a well equipped, even well engineered ship. The assassin should be fairly persistent as well, so if you escape a few times, they should find you later. You should have the motivation to get into your best combat ship to go and meet this assassin.
This shouldn't be about punishing players, but more about creating a challenge.