See the link for all the details
**https://panopticlick.eff.org/**
the tl;dr version is that the collection of environmental variables that your browser broadcasts makes you uniquely identifiable online even if you use proxies.
shit, i wanted to bold up the link for increased awesomeness, but just fucked it up instead. story of my life (although to embellish the story of my like a bit, i also masturbate frequently. shit, why am i telling you all this? i'm not anonymous anymore)
http://panopticlick.eff.org/
not a problem: http://img44.imageshack.us/img44/6/elvisl.png
Make a program that broadcast fake environmental variables and distribute it among the anonymous communities.