Wendi Deng and Rupert Murdoch Rupert Murdoch, right, with his wife, Wendi Deng (Leon Neal/Getty Images)

New York City Mayor Michael Bloomberg, we’re learning today, advised News Corp. chief Rupert Murdoch to knock it off on Twitter. Too risky, was the message from Bloomberg.

This came out of a Tuesday news conference, at which Bloomberg addressed the offensive tweets of a New York EMS lieutenant. Speaking to a reporter from the New York Post, part of Murdoch’s corporate empire, Bloomberg said, “I’ve told your boss I think he should stop twittering.” More: “Number one, I don’t understand why people don’t understand that anything you write, anything you send out, is gonna be retweeted, re-Facebooked, re-this, re-that,” noted the mayor.

Though Murdoch has committed a Twitter sin or two, his recent output suggests that he’s learned his lesson about social media risk-taking:

Safe stuff right there.

Whatever thoughts the 82-year-old Murdoch shares with his hundreds of thousands of followers, let’s not mess with his intake of media. The fellow, after all, has a history of seeing around corners. Just behold this little gem that he passed along to Fortune magazine for a 1984 piece:

Murdoch expects much of News Corp.’s future communications growth to come outside publishing. As he told FORTUNE recently: “I don’t know any better than anyone else where the electronic age is taking us, or how it will affect a large newspaper company. But I do know it’s going to have an impact. To prepare for that, and to have a position in that new industry, you want to be a major player in the production of entertainment programming.”

Too bad more U.S. newspaper execs didn’t heed that advice.

And let’s not forget the mid-’90s brainstorm that perhaps certain Americans would appreciate a cable-news option with a perspective at odds with that of the mainstream media.

Keep tweeting, Rupe. It’s all part of your visionary thing.