Can Facebook be regulated?

 After a five-hour long testimony before the US congress on Tuesday, Facebook CEO Mark Zuckerberg managed to walk a fine line as he came underfire from lawmakers. He apologised for a range of problems that have beset Facebook including the lack of data protection, but did not promise to support new regulations.

Zuckerberg is being questioned by US Congress committee members over two days. He is to answer questions on how his company handled data in the wake of a massive users' privacy breach.

But what can come out of his testimony? And what steps can be taken to ensure better privacy for social media users?