I'm guessing it was as you say, a joke, but I'm content to leave my vote in there, it could also be an attempt at strategy that isn't working as meant - I could see declaring myself a DF as a joke to convince people I wasn't one, though I don't think it would work well. But how well it works is not too relevant, in my experience, as to whether or not someone tried it anyway. If today ends up random, well, hopper will work fine, and it gets conversation going.