FIFA is clamping down on Twitter users illegally using the World Cup 2014 logo. Football's governing body has asked Twitter to issue takedown notices to six accounts. Twitter has not commented on the
request, but four of the six have so far complied. Twitter has clear rules on trademark violations deemed to "mislead" the public. FIFA is reported to have several measures in place to prevent ambush
marketing, including a ban on players wearing headphones not from official sponsor Sony.
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