Limor Fried has developed a pair of Media-Sensitive Glasses as part of her Social Defense Mechanisms thesis which darken when a television is visible, preventing the need for therapy inevitably required after too many hours of watching G4 or the Food Network. The glasses can also be configured to darken based on how much TV has been watched, or on a gradual basis and can also be set to darken in response to the standard computer CRT. WMMNA also points to SeeFree, an older visual spam blocking system that is (to my knowledge) actually available, for just $1,500.
Media-Sensitive Glasses [WMMNA]
Thesis [MIT]
