Earlier quoted context omitted.
>Both Yahoo and Google have a proven history spying on people on behalf of government. [citation needed]
And ye shall receive: "An Indian man is facing five years in jail for making an "offensive" comment [against Sonya Ghandi] after Google handed his personal data to local police." http://www.v3.co.uk/vnunet/news/2217063/google-handing-user-... Yahoo taken to task over China http://www.boycottyahoo.com/yahoo_taken_to_task_over_china.h...
The personal data that is handed over is email address of the account. It's probably a privacy violation if it's really that hard to find out someone's email address once you know his social network account, but it's not spying on people.