Related: Stealth Mountain, a twitter bot (now defunct) which would correct tweets containing the expression "sneak peak".
Both this and the bot you link to rely less on getting machines to cleverly reproduce human behaviour, and more on identifying robotic human behaviour that can be carried out by stupid machines. Since this is probably a winning strategy, I'd recommend making that the focus of such a competition.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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