SOCIAL NETWORK AND SOCIAL CONTROL: PROFILING USERS: beyond the 'echelon'

Have you ever think how social networks [like this] track and identify users [apart of login, obviously]?
are there privacy related problems?
i dont know all the way they do it
but i know one of those methods, described in this doc by MIT http://people.csail.mit.edu/edmond/projects/keystroke/keystroke-biometrics.pdf
the paper is old, so you can image how many improvements have come in these last years.you could possibly change account, login using your friends account, create a new account and use it in an internet cafe'but it is unuseful: they can yet identify you using a biometric parameter: keystroke.it's like a fingerprint that never leave youa
possible remedy is cut and paste (write in a text editor, like notepad,
then paste) but remember: DO NOT EVER USE DIRECT TYPEING into a comment
box (on facebook, myspace or whatever else)you can note keystroke biometrics measurement in action simply by posting comments on facebook using a not too fast computer.i
tried on a 1Ghz PC and i was able to type much more fast than PC
displaying letters. this was because of some javascript software
calculating the typeing pattern.make people know about this technology!let circulate the info!and now: 2 interesting films on bittorrent p2p network:
http://btjunkie.org/torrent/Vivir-la-Utopia-Living-Utopia-VhsRip-Esp-Sub-Eng-VhsRip-Esp-Mp3-Sub-Eng-TNT-Village/5324ef7b198ccd82aa92cc4be3f14f07252ab8e491ce

Title: Vivir la Utopia (Living Utopia)Genre: History-DocumentaryAudio: SpanishSubtitles: hardcoded English subtitlesrare documentary on anarchists (and their actions and ideas) during the spanish civil war in the 1930sand:ZERO: inquiry on 911: 7 years later:

http://btjunkie.org/torrent/Zero-Inchiesta-sull-11-Settembre-7-anni-dopo-XviD-Ita-TNT-Village/5324108fb2643d5197483a94f9d1edf20814c846cea4

Have Nice Vision!