Tofster, i am afraid you cannot skrike until your union has balloted for it. If you do, it iwll be considered as an illegal strike and thus could lose your job. Sad, but true.
I only asked about the cargo thing as earlier this year when we were short of crew, I believe aircarft were sent out empty but packed full of cargo and thus were worth while sending there and back. Obviously, it would only be worth while to some destinations.