Ok but here is the realist in me thinking...while it may get the FA to turn on the smile and give you faster service you have also pissed her off likely...so I can see her spitting in your food or dropping it etc...all those little things service people do all the time to get back at customers they find annoying.

I know I am a misanthrope...but experience has born it out. Very few people do the right thing because they should...they do it out of fear of reprisal or for reward.