 Here's Kate Stone on the TED stage. I'm a kindness ninja. I don't really know what a ninja does, but to me, they slip through the shadows, crawl through the sewers, skip across the rooftops, and before you know it, they're behind you. They don't turn up with an army or complain, and they're laser-focused on a plan. And so I didn't attack them, and they were defenseless. And I wrote kind and calm letters to these newspapers.