Now, it's pleading for new rules for the good of its business.
Zuckerberg said he now employed 35,000 people to review online content and implement security measures. Meanwhile, Facebook's user growth is stagnating in the USA and Canada - its most important markets. "But I actually think where we should be is somewhere in between".
The blunt comments came after a short meeting with Facebook chief executive Mark Zuckerberg and two days before Breton is due to present the first of a raft of rules to rein in United States tech giants and state-aided Chinese companies.
Earlier on Saturday, while addressing the Munich Security Conference in Germany, Zuckerberg called for Europe to regulate social media on issues such as political messages, privacy and data portability - or risk losing ground to "authoritarian" rules set down by countries such as China.
Last week, Zuckerberg wrote an editorial for the outlet insisting that he was committed to regulating political ads on the platform and said that it would go into effect when the US government set forth applicable regulations to follow.
Almost a year ago, Facebook put out a call for new internet regulation in four areas: harmful content, election integrity, privacy and data portability. He also wrote that people require perceiving that global technology platforms respond to somebody, so directive should hold companies responsible when they err. This legislation may require a new type of regulator that is proficient in data, operations and online content, the company said.
However, the EU's industry commissioner, Thierry Breton, warned Facebook that the worldwide body was not going to be dictated to by tech giants and a decision on whether to adopt tough regulations will come by the end of the year.
Soros's angry missive was a response to Zuckerberg's op-ed published the day before, in which the hapless head of the Menlo Park behemoth pleaded for some kind of government regulation that would establish clear lines on matters that "touch on fundamental democratic values" such as "elections" and "harmful content", among others.
On January 9, Facebook Director of Product Management Rob Leathern said the company will continue to allow political ads on its platform including Instagram, despite possible false information in those ads run by politicians. "It is unlikely that Facebook will follow this course". Alphabet Inc's (NASDAQ: GOOGL) CEO Sundar Pichai and Apple Inc.'s (NASDAQ: AAPL) senior vice president for artificial intelligence John Giannandrea, have also made the rounds of Brussels. The EU is expected to unveil planned rules for the technology this week, when it's also likely to flag proposed liability rules for tech platforms coming later this year.