The Pirate FOB mining fleets will now accurately show their hostility to you, if they will attack or flee on sight. Before they used to show up as light or dark blue depending on standings even if they choose to attack you.
You must have higher standings than 1.66 with the pirates to not be seen as a threat when it comes to FOB systems. They will take into account the lowest standings against their faction also (even if you are 1.66 with them, if your corporation is -6 they will use this standing.)