Decius wrote:

] Nice.
]
] So, any technological effort to prevent bot attacks is going
] to be easy to defeat. This may actually push demand for a
] federated identity system for the internet. The people
] managing systems will be responsible for verifying that their
] users are real people. An easy way to do this is to require
] telephone authentication (the way GeoTrust does for their
] personal SSL certificates) and not offer more then 10
] addresses per phone number.
]
] There are also interesting questions here about reputation
] carrying over between communities. You might need to gain a
] large audience on, say, MemeStreams before you are allowed to
] join another community with a more controlled atmosphere...

What about asking random and somewhat senseless obvious questions in that scrambled anti-bot type? Such as
"Which is better to cook, rocks or food?"
"Do you prefer to go to the bathroom in your bed or a toilet?"
"Which comes first, today or the day after?"

RE: Breaking a Visual CAPTCHA