I hate such "jokes" so much. I just need to say it. Obviously, me saying that won't change anything, I don't even believe there is a minor possibility that anyone reading this may remember it in the future and know better than doing something like that, but, really, I hate it so, so, so much. As if there's not enough semi-intended weird behaviors in all our systems. Of course, I won't pretend that I believe that if not for the things like that we could live in a world where technology actually exists to save our time, not to spend more time on maintaining technology. What a silly idea. The majority of people on this forum only exist to maintain the technology.
But still, there's no more mind-numbing, infuriating, exhausting feeling, than to find out that a thing you were debugging for the last hour was supposed to be a "fun little joke". Fun? You know what's fun: when stuff just works. That's about the most fun thing there is.