Step 1: Refuse to fly freighter flights. If your CoS and Letter of Employment allows, refuse to fly the freighter. Advise the company by email that you do not want to “volunteer” to fly freighter flights. MAKE SURE YOU DO THIS NOW, WHILE THE FACA STILL EXISTS. WHEN IT IS RE-INSTATED AFTER THE AOA'S LEGAL CHALLENGE, YOU WILL ALREADY HAVE EXPRESSED YOUR WISH.
Step 2: Do not answer the phone. Don’t help crew control out by giving them a solution to the crewing crisis.
Step 3: Do not operate into discretion. A captain’s right not to operate into discretion cannot be questioned.
Step 4: Do not work on a G-day. Even if it is favourable to you.
Step 5: Do not check Crew Direct or call crew control, except on those occasions you are required to.
Step 6: Discourage new joiners from joining under the “C-scale” of CoS08.
Or you could just act like grownups and think for yourselves.