Arnold Schwarzenegger ruffled some feathers when he visited Facebook’s politically correct campus this week.

The star of the upcoming crime thriller “Sabotage” noticed a sign that stated, “Welcome to Our Tobacco-Free Campus,” then whipped out a giant Montecristo cigar and puffed away.

He then posted on Facebook: “Naturally, I broke some rules at their headquarters.”

Afterward, the Governator visited the social network’s ice cream parlor and ordered up a double scoop, spies said. (He also wanted to try the campus barbecue joint, but it was closed.)

Before heading back to LA, Schwarzenegger stopped off at San Francisco’s St. Regis Residences to pay a visit to former mayor Willie Brown, who’s recovering from surgery, sources said.

Arnold will be in New York next week to appear at Brooklyn’s Barclays Center as a guest star on the WWE’s “Monday Night Raw” with his “Sabotage” co-star Joe Manganiello.

He’ll then premiere his latest movie Tuesday night at the AMC Loews Lincoln Square.