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These are the kind of personality tests scientific researchers ask their contributors to take part in, so they can analyze their publications based on a series of personality parameters:

http://www.outofservice.com/bigfive/
http://www.humanmetrics.com/cgi-win/jtypes2.asp
http://mypersonality.org/wikipersonality

In 2012 some anonymous proceeds at the mass scan of the whole Internet by creating a Botnet of unprotected devices.. then releases all the data collected via torrent. Interesting approach of a single, to just autonomously decide methodology, scope and way to release “data” disregarding norms and hyerarchies.
http://internetcensus2012.bitbucket.org/paper.html

Blending in
Is it possible to keep a degree of anonymity while still being profiled?
eg. http://dvyng.com/selected/blendingin/

Noise
Can adding a certain amount of randomness and pollution blur individual data?
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0067310
http://www.bibliotecapleyades.net/ciencia/esp_ciencia_manuscrito07a.htm
http://cdckeywords.leuphana.com/metadata/