Limiting POB's on 15k or what ever range away from any core game structure is not enough .
We need some rule for safe limit to define where you can put the weapon platforms and the total allowed amount of them around the POB at max safe range from any other game core structure ...jump holes mining fields...etc.
20-25 or even 30k is more reasonable distance , because ...Xk max range of the placement of W-platforms from the POB plus platforms Xk weapon range equals the Xk safe ...
Creating core 5 POB with swarms of platforms in vicinity of a mining field can be done by any rich and highly active faction .... exploiting the absence of a mentioned and wanted rule by the majority of the players ....or imagine plugging every jump holes in some guard systems .... It's more fun to be welcomed by the actual hostile players, the guards of that system, and RP a little ....then to be inst-killed by POB W-platforms just for trolls....