Austria is currently discussing a new law to improve cyber security. Facebook users might have to enter their mobile phone number when opening a social media account since every phone number is linked to personal data. This is supposed to fight inappropriate posts, comments or other forms of social media criminality. And if it occurs, it should be easy to figure out the person behind this online misbehaviour. But isn‘t that a very personal information to disclose? And how come that all these bubbly, happy friend-making online platforms turn into crimescenes? Let‘s take a look.