RE: flying behind the flightline
By “they”, I assume you mean you and your club, and its officers. We (the AMA membership) just got rid of a Safety Code that tried to cover too many aspects of safety. It was unwieldy and had become so ambiguous that it had little meaning to the average member. The rule is simple enough: separate people from aircraft and do it with a flightline designed for the site that is safe.
Is there some issue within your club that prevents open discussion and coming to a reasonable solution? This problem is not new. It has existed about forever. FF, CL, RC all mixing at one site has presented the same issues. Conceptually, there is nothing new here.