The animals were annoyed because they were embarrassed.
The fact that people thought the questions were confusing is quite worrying.
Here is what I feel the story is analogous to:
A scammer is selling dieting pills on the internet.
The scammer claims it will beat all other methods of dieting, even better than not eating outright. The scammer challenges half the commenters to use his pills (eating normally at the same time), and the other half not eating at all, may the best dieting method wins.
The commenters thought it was strange the scammer would want to challenge the best dieting method of all.
"This isn't even a dieting method, you're eating more by taking the pill!" One said.
"Well, you know what I mean", the scammer said. (it's a weight loss method).
"The scammer has some trick up its sleeve," said another.
Scammers scam, a moderator said.
"Well, you know what I mean,” another commenter said. "If a scammer challenges the best dieting method of all with his dieting pills it must have something to it to allow him to win.”
“The scammer probably expects us to root for the sensible dieting method and then look like fools when it doesn't work,” said the person with 76 points of karma. “Then the scammer will win because the dieters are overconfident and takes a banana, or binges, or something.”
The commenters agreed that this made sense. There was no reason a scammer should challenge actual dieting unless his pills had a clever mechanism of some sort. So the commenters, wanting to back a winner, all cheered for the scammer.
When the challenge began, the commenters who dieted by skipping food lost 5 kilograms within a week. The commenters who took the dieting pills just continued to gained weight.
The commenters continued to observe how the dieting pills were going to beat actual dieting. Two weeks later when the actual dieters have lost 10 kilograms, pill takers did not lose any weight, and in fact, gained 10.
The commenters lynched the scammer.
MORAL: Scammers scam.
People make foolish predictions because they don't want to become fools, but then when their foolish prediction turns out to be foolish, they seek revenge, vengeance. This seems to be happening more and more these days, and that's why I am worried people think this set of questions were confusing.