Facebook has been involved in several controversies, particularly involving privacy concerns. Facebook prevented users from permanently deleting their accounts until 2010 and has been criticized for changing user’s privacy settings, making more information publically visible or available to data mining, without their explicit consent. The site has been repeatedly criticized for removing photos uploaded by breastfeeding mothers and deleting their accounts.
The company Twitter has not been involved in any major controversies itself, but the site has been the focus of several legal cases recently. In July 2012, a British teenager was arrested after sending abusive tweets to Olympic diver Tom Daley, and earlier in 2012, a student was jailed for inciting racial hatred after tweeting abuse at Fabrice Muamba.