Well, for the whole space mining thing to work you have to be able to drop a payload accurately. Most of the stuff that we could refine in space and land softly would have to be a high value/kilo ratio items... everything else has to be splashdown city. If we can do it with an Apollo Capsule we should be able to do it with a chunk of iron we processed after catching and mining it's momma. And if we can find a place to drop it safely (not counting birds, sea life and all the other stuff we ignore to make a buck) then someone could also drop it unsafely... on purpose.
Space Police is going to be a growth industry. And it will try to stay on top of things so that people don't get outside the system, until they actually leave the solar system. In all cases, people are people, and they will take their bullshit "I have a right to tell you all what to do because of {someCrap}" story across the universe if they can.
If there is extraterrestrial intelligent life watching us now, they are gonna shoot us in the head the minute we leave our solar system.