A teacher is reprimanded after comments about drinking and parties appeared on her Facebook site and were viewed by pupils. More - Teacher's Facebook drinking posts
The Brazilian government files a lawsuit against Twitter, demanding it block material that helps motorists evade drink-driving traps. More - Brazil sues Twitter over alerts
David Cameron has lent his support to Safer Internet Day, saying making sure parents are empowered enough to ensure their children's safety online is a "personal priority" of his.