I was unaware that griping about the challenge is required. Okay, this I can do. I hate the genre personally, too much like the movies/games that my brother likes. Which could be what went through my mind when I tried the challenge. Probably why people took me as morbid.
Well, it's not so much required as it is traditional.
Generally a bunch of people greet the new challenge with a rousing cheer of "oh noooo, whatever shall I do, I'll never think of anything" and then within six hours (or sometimes six minutes) they post a fabulous story. The rest of us put off writing a story (or at least posting it) till closer to the end of the month, so as to take full advantage of the time allotted for groaning.
Oh, and there are a few misfits who actually like any given challenge, with the possible exception of Chrispy's ode to Kipling. (Ok, mosaix liked it, and I did, too, but we still groaned anyway. As I said, it's traditional.