Hi FA's, Im a Captain with a 121 airline and it would be nice that if FA's are jumpseating (even if its cabin only), to say hi to one of the crew members when they come onboard. You are crewmembers just like pilots - show ID, and jumpseat form to one of the crew members when you come on board as a courtesy for traveling for free (or nearly free). There is an airline out there (cough AA cough) where their airline training doesn't state this to them and they just casually stroll on board and have a seat. Pilots notice this and do not appreciate it.
However, I'm not saying all FA's do this - just from my experience, I have seen this happen on multiple flights.
Well it been my experience its better if they just take their seats especially if they are not familiar with your a/c. If you want a date try Match.com
And for they guy that said the j/s seat was sold on safety I think history would show the opposite. J/S was sold as Capitan's privilege and most management and some line pilots felt it was unsafe.