Many other artists have since worked in a similar vein, portraying their most extreme facial expressions.

FORBES: Franz Xaver Messerschmidt Knows How You Feel

One workshop I found to be particular interesting focused on the privacy implications of biometric data, including fingerprinting, finger vein scanning, retina scanning and facial recognition.

FORBES: Data Privacy Commissioners Discuss Ubiquitous Tracking

Facebook has the largest facial-recognition database in the world, a potentially rich vein of data for any government agency.

CNN: After Boston: The pros and cons of surveillance cameras