I have only seen "these" one time... and it was a XJ guy who was giving me a hard time for "not flying the 9" in the line at lenny's. I explained to him that the -9 is a DC-9, but the -900 is a beautiful airplane. He proceeded to tell me how he made more money, flew to better places, and how he was in the best spot in aviation. I asked him what his QOL was and he said "O, I'm on reserve so about 11 days off and 3/4 weekends". I chuckled and he couldn't figure out why!
My "brother" is now at XJ and on the -900 so I have heard why guys say the -9 and all, but this one guy was a rotten apple. I have nothing against XJ but on topic of the upside down epaulets... yep... seen it....