The facial recognition tool, launched in 2010, suggests names for people it identifies in photos uploaded by users - a function which the plaintiffs claim runs afoul of IL state law on protecting biometric privacy.
The suit-first filed in 2015-alleges that Facebook's photo-tagging feature violates Illinois' Biometric Information Privacy Act (BIPA), which forbids collection of identifiable biometric data without a person's explicit consent.
Executives from Facebook will appear before an Oireachtas committee later today to consider the use of social media and its potential influence on previous and future elections and referenda. In March, news surfaced that Cambridge Analytica - a political data firm with ties to President Donald Trump's campaign - had accessed and improperly stored a huge trove of its user data.
Testifying before the US Congress, Facebook CEO Mark Zuckerberg had said his organisation was committed to ensure integrity of elections across the world, including India.
BOOM will review English language news stories flagged on Facebook, check facts, and rate their accuracy, it said.
This law protects people over information such as fingerprints, retina scans, and facial recognition. The court responded that users' privacy, not wallet or body, was harmed by Facebook's tactics.