Jumpseat war!!!
However, one side has more to lose than the other... I used to get into arguments with UA pilots at my air medical office over having priority on our own metal. That by itself is egregious and disgustingly spoiled for them to ever think that is ok.
The real issue and power struggle is that you want their job. Place yourself in a position where their job is no longer desirable and jumpseating is no longer needed, and you remove all of their power. However, at the end of the day, people just want to keep their job, earn a paycheck, and see their loved ones.