Stupidly simple app phenomenon Yo got hacked, and hacked, and hacked again

Yo, an ultra-simple messaging app that became an instant phenomenon this week, has already been been hacked. An unnamed Georgia Tech student told TechCrunch that he can use the app to get any user’s phone number, pretend to be another Yo user, and spam users with an unlimited number of “Yo” messages. The hacker also managed