Greece: Smashing Plates Syndrome

What is the symbolism behind the smashing of plates?

What are the semiotic implications?

Wikipedia has some possible answers

Economists might have others.

Is it just a display of kefi and carefree (formerly untaxed) wealth?

No receipts issued.

Miss Piggy and the Muppets

The End of Kefi? (Posting, May 2012)

Update January 2014: Get kefi and smash a lot of plates in Australia! See last item below