If I were working for the Iranian or the Chinese government, I would immediately dispatch my Internet geek squads to check on Google Buzz accounts for political activists and see if they have any connections that were previously unknown to the government. They can then spend months on end drawing complex social circles on the shiny blackboards inside secret police headquarters.
But potential risk from disclosing such data extends far beyond just supplying authoritarian governments with better and more actionable intelligence. For example, most governments probably already suspect that some of their ardent opponents are connected to Western organizations but may lack the evidence to act on those suspicions. Now, thanks to Google's desire to make an extra buck off our data, they would finally have the ultimate proof they needed (if you think that this is unrealistic, consider this: the Iranian authorities have once used membership in an academic mailing list run out of Columbia as evidence of spying for the West).
Posted by Steve S at 8:45 PM
A few worries for democracy: