Pavel Durov's post criticising WhatsApp over privacy concerns went viral after the Supreme Court asked WhatsApp to quit India if it can't follow data-sharing rules. The Telegram CEO shared an old chat of Mark Zuckerberg calling early Facebook users "dumb f***s" for sharing personal information. "Today, WhatsApp's owner is privately laughing not at 4,000 but…four billion 'dumb f***s'," Durov said.