PoB in mining fields aren't actually needed there. No one would be missing out if those bases were moved 5k out of the field but most of the bases do serve a purpose and help multiple players which again they would still do if they weren't in the mining field itself. Just for the record though if you count server game play harmed if you can't just jump on a defenseless miner and demand "X" amount of credits then either take the credits or space them I don't think you understand what RP is and maybe you should be playing on another server.