In one semester, he found people who were copying on their homeworks by creating a website with solutions to a problem on an early assignment. Many people fell into the trap, even after he had given a very clear disclaimer to not use search engines to solve homework problems.
10. Salman Khan: Let's use video to reinvent education
9. Tim Harford: Trial, error and the God complex
8. Harald Haas: Wireless data from every light bulb AND Cynthia Breazeal: The rise of personal robots
7. Richard Wilkinson: How economic inequality harms societies
6. Lee Cronin: Making matter come alive AND Skylar Tibbits: Can we make things that make themselves
5. Morgan Spurlock: The greatest TED Talk ever sold
4. Luis von Ahn: Massive-scale online collaboration
3. Stefon Harris: There are no mistakes on the bandstand
2. Bunker Roy: Learning from a barefoot movement
1. JR's TED Prize wish: Use art to turn the world inside out
It's just horrible that in a time of great motivation that they still try to push a security issue to the end user. And for me they made it even worse with re-captcha because now you have to type 2 words.
A solution would be to know which is a computer and which is a real user, it's not impossible to do so.
It seems like you have revolutionary knowledge that could change the course of human history. Or you're just trolling. Since you are not pointing to any actual approaches and hundreds of thousands of engineers have not yet come up with what to you is just "a solution" that doesn't even require further specification, I will go with trolling.
Figuring out remotely whether you are dealing with "a human" without any interaction (or, particularly, interaction less than a captcha, or even -gasp!- a two word captcha) is very definitely impossible. Think about it - how do you know whether it's a human? Well, you say, the black box device that he is sitting at has made sure that he is! And how does that machine transmit data to you? Over that data line that this supposed human is sitting right next... I guess you will see where I'm going with this.
Both Damon Horowitz's talks are great:
Specially the "moral operating system". Everyone doing something with data should listen to that.
Makes one think of self-assured designers vs. AB testing, how trial and error is much better approach to the design of a site than God complex approach.