Idiocy auto-hacks Twitter accounts on public Wi-Fi, warns the owners about Firesheep
Once it's grabbed someone's login credentials, Idiocy will post a tweet from their account, warning them that they've been compromised and linking to a page about Firesheep and how to secure your account against it. It sounds malicious, but Idiocy is more like a public service than anything else. Sure, the tech blogs and Twitter buzz about Firesheep should be enough to convince people to use HTTPS when they log into social networking sites, but some people just don't get the picture until it affects them personally.
The moral of the story is that, unless you want someone maliciously using Firesheep on you, or using Idiocy on you for your own good, you should consider taking five minutes for some quick security fixes.