In 2014, Facebook bought WhatsApp for $16 billion, making its co-founders — Jan Koum and Brian Acton — very wealthy men.

Koum continues to lead the company, but Acton quit earlier this year to start his own foundation.

And he isn’t done merely with WhatsApp — in a post on Twitter today, Acton told his followers to delete Facebook.

“It is time,” Acton wrote, adding the hashtag deletefacebook.

Acton, who is worth $6.5 billion, did not immediately respond to a request for comment.

Nor did Facebook and WhatsApp.

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