[drivebyacct]

There's an even easier solution... require confirmation via email. You send the post as an email, you get an email back immediately asking for post confirmation.

edit:

It looks like this is already standard functionality (if turned on, and even if not there is still an email sent with a delete link).

I don't think dustin does a good job explaining why "It is OK" in this blog post, but I think I agree with his conclusion, this doesn't seem like a big deal if a user has opted for the more optimistic workflow rather than the more precautionary one.