How about insisting that harnesses have to be approved for specific use - not just purchased from local hardware store?
A direction that would be refreshing would be for the regulator to ensure that the company that advertises a flight is also the company that ‘enables’ the flight - if that means they have to own and operate the aircraft, and be the one approved to carry out such a safety-related business, including air and ground crew then you will find a step-change in attitude and accountability.