Gmail adds featuer to stop email while drunk or not coherent.
This is actually for real, Gmail just introduced this feature. When you enable Mail Goggles, it will check that you're really sure you want to send that late night Friday email. And what better way to check than by making you solve a few simple math problems after you click send to verify you're in the right state of mind?
If only there was a similar feature for bloggers . . .