Facebook came under fire recently for experimenting with 700,000 of its users' moods by altering their newsfeeds, but an interesting counter-experiment that makes the site the subject of investigation is taking the Internet by storm.
"99 Days of Freedom" sees users stay away from Facebook for 99 consecutive days, filling in a "happiness survey" at 33, 66 and 99 days to see if taking a breather from the site affects their mood.
