Mike Butcher sits down with Telegram's Pavel Durov to discuss the limitations of WhatsApp, the importance of privacy, and the implications of having ISIS as users. Subscribe to TechCrunch today: http://bit.ly/18J0X2e TechCrunch Disrupt is one of the most anticipated technology conferences of the year. Disrupt SF has an all new slate of outstanding startups, influential speakers, and celebrity guests.