Sobriety test targeted at Facebook and Twitter nightowls

A new web application has been designed to stop drunk people posting things they may regret on Facebook and Twitter.

The 'Social Media Sobriety Test' sets users challenges which are too difficult to complete if you're tipsy.

People who fail to to follow a moving finger with their mouse, or to guess how long 30 seconds is, get locked out and are advised to "just go to bed".