EU Commissioner Thierry Breton told the Financial Times that the proposed remedies, which he said would only be used in extreme circumstances, also include the ability to exclude large tech groups from the single market altogether.
In addition, Brussels is considering a rating system that would allow the public and stakeholders to assess companies' behavior in areas such as tax compliance and the speed with which they take down illegal content.
The new EU legislation would increase Brussels' powers to scrutinize the way technology companies gather information on users, following concerns raised by independent researchers that the voluntary disclosures groups make are often misleading or partial.
Mr. Breton confirmed that the EU would not remove the limited liability that companies have for the content published on their platforms. "The safe harbor of the liability exemption will stay," he said. "That's something that's accepted by everyone."
However, regulators in Brussels are drawing up a blacklist of activities that technology companies would be required to stamp out. They are proposing a sliding scale of penalties for non-compliance, up to and including the separation of some operations. Mr. Breton said draft legislation will be ready by the end of the year.
Activities that could lead to tougher sanctions include companies preventing users from switching platforms or forcing customers to use only one service, he added.
Mr. Breton said the new system of oversight will be based on a collective effort between national governments and the EU.
"We need better supervision for these big platforms, as we had again in the banking system [after the financial crisis]," he said.
Proposals are being finalized, and once they are agreed they will go through the European Parliament and the European Council.
Proposal would give EU power to boot tech giants out of European market
Companies could be broken up or forced to sell off European operations.
arstechnica.com