Last
week, Twitter provoked a fierce debate online when it announced a new capability–and related
policy–to hide tweets on a country-specific basis. By building this feature
into its website’s basic code, Twitter said it hoped to offer a more tailored
response to legal demands to remove tweets globally. The company will inform
users if any tweet they see has been obscured, and provide a record of all
demands to remove content with the U.S.-based site chillingeffects.org.
from Committee to Protect Journalists http://cpj.org/internet/2012/02/twitter-google-selective-blocking-censorship.php