Unfortunately, it's not that simple. This specific implementation happens to use flash because it's fast and easy, but there is also a javascript/css based way

Unfortunately, it's not that simple. This specific implementation happens to use flash because it's fast and easy, but there is also a javascript/css based way of doing it: http://www.lalit.org/lab/javascript-css-font-detect http://www.lalit.org/lab/javascript-css-font-detect It looks incredibly delicate, but it seems to work. Also, I blocked their flash script and reloaded the page; My fingerprint changed, but I was still a unique butterfly. An absence of fonts is also distinguishing characteristic.