I overheard two FAs discussing a "new announcement" on a flight today. The purser claimed the TSA had asked them to tell passengers that beverages received on the plane could not be taken off the plane.
The second FA found this utterly ridiculous and asked if it was some kind of joke, and the purser seemed to agree--but said the TSA was requiring the announcement, and sure enough, the announcement was made midway through the beverage service.
So WHAT IS THE TSA WORRIED ABOUT?!!! A "dangerous" liquid being taken OFF a plane?!