According to new rules, “shops who have used the word ‘Olympic’ in the name of their business are exempt from policing by the LOCOG as long as the name was established before 1995, a decade before the 2005 London bid.”
Now, even using one of the two of the following words in an expression, “Games, Two Thousand and Twelve, 2012, Twenty-Twelve,” are likely to be considered a breach of the rules.
Expressions with words, London, medals, sponsors, summer, gold, silver or bronze is another likely breach. Even posting your pictures of you gurning with a thumbs up in Olympic Park could land you with a fine."
— London 2012 Olympics Trademark Control Freakery - London Olympics: Top Three Crazy Corporate Rules Medalists