This is precisely what I said in private email – which was not to Megan McArdle, by the way; she’s being hyper-sane on her own – when this ludicrous Slate post about one-spacing was written! My exact words were:
You may have my second space when you pry it from my cold, dead hands. I don’t care if this upsets typographers. I really and truly do not.
I don’t know why, but the fact that Megan independently came up with the same response that I did is immensely cheering.