Facebook has come under fire following revelations that it conducted a psychology experiment on 700,000 users without their consent. The research was conducted in collaboration with two US universities in an attempt to find out whether exposure to emotions led to a change in the type of postings people put on the site. Facebook denies any "unnecessary collection of personal data". While Jim Sheridan, MP, has called for legislation to protect people, others argue that this experiment does not differ greatly from the way in which Facebook controls news feeds on a constant basis.

The Information Commissioner's Office is reportedly looking into the matter but has not yet said whether there has been a breach of data protection law and whether or not it is likely to take further action.