The simplicity of it is logic defying. It used to be that you had to find crosswalks or move puzzle pieces or type blurred letters and numbers, but NOW all the sudden I can just click a box and HEY!, I’m human?
That’s hardly the Turing Test I’d expected.
If you’re using a webpage JavaScript can see your mouse cursor and anything you type. But only if the browser has focus. So if you’re typing in another window it can’t