BH can shoot the Order since they are enemys. However cannot open fire on corsair without a bounty on them.
Among the Corsairs seems to be the idea that the BHG and Corsair are motal enemys. SO everywhere I go corsairs attack me even if I am just sitting there.
The Corsairs are kind of allies with the Order, but does that make them enemy to the BHG?
I didn't think so till a corsair told me that...