Law professor Maureen Mapp said the tech giant could get hit with a bill of up to £625 billion.
Dr Mapp told the Sun that the 50 million users who had their data harvested by Cambridge Analytica could be entitled to damages.
“There are about 50 million users whose data was harvested,” Dr Mapp told the site.
“Assuming each one of them brought a claim for compensation for distress caused by the data breach…each individual may be awarded £12,500 as damages.”
Of course, if such a claim was brought against Facebook it could have dire consequences – the company’s total value sits at £317 billion.
David Barda, a data protection lawyer for Slater and Gordon said the amount would be less.
“I think a much more realistic figure is £500 per claimant,” he commented.
“The amount of compensation will depend on the level of distress suffered, but Facebook could be facing claims of up to £500 per Facebook user if those users were able to demonstrate their distress.”
The UK Information Commissioner’s Office is already investigating the Cambridge Analytica scandal – which saw data harvested through an app circulated on Facebook.
Anyone who wanted to sue the company would have to do so under the UK’s Data Protection Act and prove that the breach had caused them distress.
Facebook founder Mark Zuckerberg made a grovelling public apology over the data scandal that’s hit the firm in an advert posted in the backs of several newspapers, including the Sunday Mirror.
It says the harvesting of millions of profiles’ data in 2014 “was a breach of trust, and I’m sorry we didn’t do more at the time.”
It adds: “Thank you for believing in this community. I promise to do better for you.” (Mirror)