"When you think about it, large scale requires unsupervised..."
Not necessarily. Crowdsourcing is another option, like Google's image tagging game, reCAPTCHA, et cetera.
Pay a herd of people to do things, and they'll do things for you. You don't have to pay them in money. Telling them they have a high score is often enough.
Yes, "requires" was too strong. I should have said they go well together. I was trying to get at the fact that it's highly common for large-scale work to be unsupervised.
Not necessarily. Crowdsourcing is another option, like Google's image tagging game, reCAPTCHA, et cetera.
Pay a herd of people to do things, and they'll do things for you. You don't have to pay them in money. Telling them they have a high score is often enough.