Facebook has come under fire this week for a controversial experiment it performed on 689,000 of its users in 2012. The team, founded in 2007, is made up of around 30 doctors, scientists, and ex-academics who The Wall Street Journal reports have been able to conduct hundreds of tests on Facebooks 1.3 billion users with few boundaries or limitations. The Wall Street Journal describes one such test, in which thousands of Facebook users received a message from the company. The message said the affected users were to be blocked from the social network because Facebook thought they were either robots, or using fake names.