7:15 AM
@gung thanks -- I had read that that's what it was, I just hadn't got to try it yet. I don't imagine it's something I'd do very often, because of that very reason - when I am one vote among many, the occasional misjudgement is no issue. When I'm the only vote, I'd want to be sure. If moderators were for some reason not around or not able to keep up I might be inclined to use it more. It's good that we have it in different tags - if it were ever needed we have the two most popular tags covered.
It seems to me there's a clever little abuse, which is to add the tag to a post that really needs to be closed. I can't imagine a situation where that should prove necessary, but I guess if there's some kind of unforseen need to close a post very quickly in the absence of a moderator, it's something that could be done. I imagine that would be very much frowned upon though.
I can't think of a good reason to ever need it. I can just conceive of situations where an OP might want to delete a post in a hurry ... but that's not something that would help with.