Ok, I can't resist.
Rob, the point of letting the FAs serve drinks while the seat belt sign is on is directly related to the other comment on regarding the "overweight old FAs". The theory is, if they get injured on the job, we get to hire new flight attendants...preferably younger, better looking, straight female FAs.

Yes, one may fall on you, but that is just acceptable collateral damages...and why the airlines carry insurance.
Obx. Good comments and observations. To be fair, there are some great FAs out there. Unfortunately, they are far and few in between. Same goes for gate agents, etc. Unfortunately, those that aren't predisposed to a "regional mind-set"(regional as in area of the country...not airline)), shall we say, have had to deal so long with all the other morons that you describe and have become disgruntled to the point of hating their jobs and the customers. At which point, in my opinion, its time to move them to a position where they don't interface with the customer as much.
We say that most passengers check their brain at security screening. It seems that the ability to follow simple commands, to read signs, and to be aware of their surroundings disappear upon entering an airport. A condition that only worsens when you put them into a tube with little windows and they feel they have lost control of their situation. Air travel has become so common place to even the lowest common denominator, that they give no thought to the fact that they are in a pressurized, explosive tube 6+ miles above the earth in a deadly environment where times of useful consciousness is a matter of seconds. To them, its just another Grey Hound bus and, because they paid $59 to go coast to coast, you are now their hired servants for the next 6 hours. Never mind that their fare didn't even cover the cost of the gas it took to carry their butt the distance they traveled. (I know that doesn't apply to last minute guys like you who make up their difference). Then, they proceed to trash the plane with their garbage despite the fact the FAs come through the cabin several times to collect trash. People can't seem to comprehend that the pocket in front of them isn't a trash can...or at least should be emptied when they come around.
I could go on and on. But I'm in Cancun and it's time for lunch down by the beach!