Maybe it's just me but I wasn't aware about Twitter's direct message feature so to me this seemed like I would shout out which domains I was about to register. But then again I don't use Twitter that much.
Hopefully this is a good enough explanation for now. Though it still doesn't explain the intricacies of Twitter for the non-Twitter-user. Perhaps I should add a "more info" or FAQ. Thanks again.
I see this more as a service for power Twitter users so they can easily register new domains after having a drunken idea.