Sooner or later you knew it would happen: Big tech would invite government regulation to deflect even greater intervention such as an antitrust breakup.

Facebook CEO Mark Zuckerberg is the latest to welcome governments to play a “more active role” in governing the internet, presumably including his company. In an op-ed Saturday in the Irish Independent and Washington Post, Mr. Zuckerberg invited European-style privacy rules for the U.S. and called on regulators to set clearer rules on “harmful content, election integrity,...