This right here should be considered every time some unnamed players try to use an excuse of something something immersion for only said player( I.E. "imma pirate yaaarrrrr" or "imma paid merc" etc )In universe this could be explained as the Pilots Federation cracking down on infighting between its members or the insurance company (assuming it is not just the PF) attempting to reduce losses from clients shooting each other for no profit.
Purely mining salt is just a poor excuse. I get it, you may or may not like to do that for your fun, but it isn't fun for the game and everyone else. Stop hogging the game for yourself and let others play their way too.