What is the purpose of an expiration date? When I got mine in the mail after waiting a very long time, it was already the end of September. I didn't even think it would expire so I put them in my drawer until I had time and money to shop (other financial obligations, you know).

When I went to use them, I discovered they expired nine days ago. Expired?! Why in the world would they expire before February 17, 2009 let alone AT ALL? What is the purpose of that?

To what government office does one lodge a formal complaint?