Important: Is the White House mocking pro-lifers?

AmP reader Chris emailed me:

You may remember sometime ago there was an empty envelope campaign where folks on the side of the unborn were encourage to send an empty envelope to the white house, with the message "this envelope represents a life lost to abortion" or something along that line. My wife sent an empty envelope. In our mailbox today, was an empty envelope with the return address "The White House, Washington, DC, 20500." There is no message inside nor on the back. It is hand-addressed to my wife

Here is a picture of the letter she received:

She blogs about the experience here (the comments are also interesting). 

I'd be interested to find out if others who sent empty envelopes to the White House received an empty one back. It's an odd coincidence, to say the least.

If some snarky intern did indeed think this would be a fun way to get back at pro-lifers, I think Chris and his wife are owed a second letter - an official apology.