'Who's the idiot now?' is a Twitter bot (with the handle @whostheidiotnow) that has a completely straightforward but hilarious way of calling out some of the meaner tweets on the social media site. The bot's only function is to retweet any tweet with the phrase "your an idiot" -- as opposed to the grammatically correct "you're an idiot."
While the bot is slightly caustic in its intent, conscientious followers can at least be assuaged by the fact that Who's the idiot now? only ever calls out people who are themselves engaged in online bullying.
The brilliant thing about the bot is that it can achieve its sarcastic call-outs without having to create any content of its own. All it does is amplify for its hundreds of followers the solecism that's already in users' tweets.
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