Coca Cola 'ambush' at the Oscars. Is the World Cup next?

According to Wikipedia 'Ambush marketing is a marketing strategy wherein the advertisers associate themselves with, and therefore capitalize on, a particular event without paying any sponsorship fee'. World Cup organizers are on the lookout, see - Brands advised to avoid 'ambushing' the FIFA 2014 World Cup. It should be fun to keep an eye out to see if a logo inadvertently pops up. Are the signs in stadiums with John 3-16 infringements?