"If you're not playing along at the time the show is being broadcast, you both don't get to see what your friends are doing, and they don't get to see what you're doing, " said Matt Millar, founder of Live Talk Back.

CNN: Tweets and apps give TV the X Factor

"We've seen executives leave laptops on buses or in the back of taxis, " said Matt Adams, a manager in Deloitte's security and resilience team.

CNN: Are you in danger of 'drive-by' hacking?