But mostly, it's a way to let them know how important you are. /s

While I think the FA broke decorum, people need to remember how many people are on a flight, wanting things, and act accordingly. in the middle of a long flight, sure. During drink/dinner service, perhaps not.

Not trying to beat up the OP, as he clearly didn't realize they were still serving, but I wouldn't make a Federal case out of it.