Are the old and the uneducated:
Children may be stereotyped as rotting their brains with too much TV, but actually the time spent in front of the tube generally rose steadily with age. … Additionally, the less educated you are, the more TV you watched on the average day last year. Americans with college degrees spent 1.76 hours watching television on the average weekday, whereas high school dropouts spent an average of 3.78 hours per weekday.
(Chart from Derek Thompson)