Minutes later, both the Facebook pages of both Tesla and SpaceX had been deactivated.
Then someone else dared him to delete Tesla's page, too; and the entrepreneur agreed to do it, commenting that "it looked lame anyway".
Prior to the deletion, both the two pages had over 2.6 million Likes and Follows, and very high engagement rates.
But it will be interesting to see if this will actually have much impact on SpaceX and Tesla's bottom line or their respective brands.
On Friday, another Twitter user nudged Musk to delete the SpaceX Facebook page as well. Now even the Solar City page has been wiped out of from its existence on the Internet by a genius such as Elon Musk.
He said, "I didn't realise there was one". On Friday, Musk responded to a tweet from WhatsApp co-founder Brian Acton to delete the accounts. Musk coyly agreed and said he did not know there was such a page.
"What's Facebook?" Musk tweeted.
Elon Musk, the prolific CEO of space-exploration startup SpaceX and electric vehicle manufacturer Tesla, has joined the #DeleteFacebook movement.
After an alleged data theft of almost 50 million users involving Cambridge Analytica, Facebook came under massive scrutiny for its privacy laws and the amount of data it shares with third-parties. Musk shot back in a tweet, saying: "I've talked to Mark about this".
He further elaborated that his companies have never advertised on Facebook.
In response to a post reporting on Sonos' decision to temporarily suspend Facebook adds, Musk replied "Wow, a whole week?"
He said: "Instagram's probably ok imo [in my opinion], so long as it stays fairly independent". Despite taking responsibility and stepping up to the plate, the damage has already been done, and it appears now that Mr. Musk isn't going to let Zuckerberg off that easy.
" Also", he included, "we do not promote or spend for recommendations, so ... do not care".