The Olympic troubles of social media users:
* Greek triple jumper Voula Papachristou barred from attending the London Olympics after posting a message mocking African immigrants.
* Swiss footballer Michel Morganella's post-loss tweets that South Koreans were a "bunch of mongoloids" and could "go burn."
* Brazilian under-57kg judo fighter Rafaela Silva racially abused via twitter after her Olympic Games defeat.
* Team GB diver Tom Daley allegedly told he failed his dead father by finishing fourth and then threatened via Twitter, leading to the arrest of 17-year-old man.
* British lawmaker Aidan Burley chastised for his Twitter critique of the opening ceremony: "leftie multicultural crap."
* Athletes' Twitter campaign objecting to sponsorship restrictions that went viral under the hashtag "WeDemandChange."
* A television viewers' uprising over Olympic broadcaster NBC's decision not to live stream the opening ceremony.
* A British journalist claims his Twitter account was blocked after he criticised NBC's coverage of the opening ceremony and posted the e-mail of a network executive.
* Nick D'Arcy and Kenrick Monk to be sent home straight after the Olympic swimming competition after posing with guns on Facebook.
* Emily Seebohm saying she spent too much time on social media, partly explaining why her 100m backstroke medal is silver, not gold.
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