Although it may seem obvious to us who care, regionals are pumping out pilots like crazy, and no one is taking the time to educate them on proper jumpseat etiquette. Then I hear stories at the hotel during sim about how a buddy from class pissed off a captain, and he was totally confused as to why. It was because of his complete lack of knowledge of proper jumpseat etiquette....
Unfortunately with this mass movement of careers in the industry comes an influx of an entirely new cultural tide in the industry which won't be fully realized for at least another 10 years.