Different X4: Foundations Guides:
When stations are massive sufficient they may start to generate mass visitors of smaller NPC ships that fly across the station alongside particular lanes. A few of these ships will likely be Police Automobiles which is able to deviate from the mass visitors lanes to scan random ships close by for wares that are unlawful to the faction which owns the sector. Failure to conform will trigger the Police Automobile to go hostile and assault the offending ship and will even result in the entire station attacking the ship. Killing mass visitors is taken into account a hostile act by the proudly owning faction. Mass visitors will often spawn Felony owned craft which will be killed with out penalty and even earn notoriety with the faction which owns the station.