Although interesting, it's hardly a good tracking method if it can be foiled by simply installing a new font.
"And the EFF found that making tweaks to one's browser in the hope of altering a fingerprint was largely futile—algorithms could correctly decipher most fingerprint changes over time."
It turns out that altering your fingertips to become untraceable simply reduces the sample space to "mutilated fingerprints". The same logic holds here.
http://www.ncjrs.gov/App/abstractdb/AbstractDBDetails.aspx?i...
(Graphic designers are the exception.)