Since it has been confirmed that we will be able to build, let's call them "Megastructures", like Deathstars or possibly even howl moons, will it be a thing for man made vessels to have a gravitational pull.
Meaning that if some group or coalition actually managed it to construct a space station with ~160km width I don't see a reason why it shouldn't attract small objects.
Would it be to much load for the Servers to calculate the gravitational effects of every Ship, Station, etc?