Once again, you are living in a black and white world that doesn't match everyone's reality.
I'll give you an example: During new-hire orientation, an ACP specifically told our class that my new airline's policy concerning jumpseating in the back on Air Group flights was NOT to pay our respects to the Captain, either before or after the ride. I knew enough to know that this was wrong-headed, and I always pay my respects if riding on jumpseat authority, but none of the other new-hires had enough experience to realize what a crock they were being fed.
Another example: My airline's FOM specifically says that jumpseaters riding in the back on my airline are to be directed, by the FA to their seat, and are not to pay their respects to the crew either before or after the ride. Bunch of crap, if you ask me, and goes against everything I thought I understood about jumpseat protocol.
So please don't try to sell me your blanket "it only takes common sense" notions. It isn't always that clear cut -- except apparently to you, who worked at all the right airlines, with all the right unions, who distributed plenty of unequivocal, unambiguous instructional material on jumpseat protocol.