World's biggest tech companies get failing grade on data-privacy rights

Firms such as Google and Facebook didn't offer users basic disclosures about privacy and censorship. 'The best-scoring company got a D,' says thinktank

The world's top tech companies are failing when it comes to privacy and freedom of expression, according to the most comprehensive assessment to date of their user agreement policies.

Related: How a digital rights project ranks tech firms and attempts to fix global failure