I am sure March AFB has a clear zone. It is still a very active air operation and not very far from Moreno Valley. Until just a few days ago, there was an active RC club flying off parts of Norton AFB (now known as San Bernardino Airport). Your idea would shut down dozens of RC operations. I know of one flying off a private runway in Georgia and our own field is not more that three miles from a private strip. So I would be a bit careful about a 10 mile clear zone.