I think that it is inappropriate for the FD crew to "thank" the cabin crew for all their hard work. After all, the cabin crew are paid to do a job. They do it excellently, so it really is cringe-worthy and not a little patronising for pilots to make such announcements. What would be the reaction if the purser announced "didn't the captain fly well today?" I wonder...Couldn't you tell them that it doesn't go down well in the cabin?
Glamgirl, you must hear the same jokes over and over again
It's quite easy to over-step the line between a making few witty comments and sounding liking an idiot. The bags joke isn't very funny....