Pruning the forum database.
"The number of government requests to remove content from our services was largely flat from 2009 to 2011," says Chou."But it’s spiked in this reporting period. In the first half of 2012, there were 1,791 requests from government officials around the world to remove 17,746 pieces of content."A lot of this is down to copyright owners rather than governments. Google says it's now getting an astonishing two million takedown requests a week from copyright holders, compared with just 100,000 per week a year earlier.