In the early days of IRC, around 1991, there was this bot that was ... possibly the most brilliant Turing test dodge I had ever seen. It would respond with keywords, but only in the most argumentative, liable-to-set people off, divisive manner possible. The arguments, I figured through probing, were pre-programmed, it wasn't coming up with them on the fly.

You see, people didn't figure out that it was AI because they were too angry. It passed the Turing Test not because it could think, but because it made ordinary people stop thinking. Just as clever as we are if we're both dolts.