The tweet came in response to a post by comedian Sacha Baron Cohen highlighting Facebook's alleged monopolistic behavior and calling on the government to take control of the social media giant out of billionaire Mark Zuckerberg's hands.
"#DeleteFacebook it's lame," Musk replied.
The SpaceX founder has previously been critical of Facebook in his tweets. He wrote in a 2018 tweet that he does not use the social media site.
"It’s not a political statement," he tweeted in response to an article about his decision to remove Tesla and SpaceX from the site. "I didn’t do this because someone dared me to do it. Just don’t like Facebook. Gives me the willies. Sorry."
While Facebook activity continues to increase year after year with more than 2.5 million active monthly users, there has been a recent trend of younger social media users ditching the site for other platforms. However, many of those younger people still use Facebook-owned Instagram.
"Instagram’s probably ok [in my opinion], so long as it stays fairly independent," he tweeted in reply to a user asking about his opinion of the photo-based social media app. "I don’t use FB [and] never have, so don’t think I’m some kind of martyr or my companies are taking a huge blow. Also, we don’t advertise or pay for endorsements, so … don’t care."