There has been a lot in the media about the so-called guerilla or ambush marketing. A definition:
"An unconventional way of performing marketing activities on a very low budget Guerrilla marketing is quite different from traditional marketing efforts. Guerrilla marketing means going after the conventional goals of profits, sales and growth but doing it by using unconventional means, such as expanding offerings during gloomy economic days to inspire customers to increase the size of each purchase."(1)
One of the biggest examples that was spread (unintentionally) worldwide was about the so-called #Bavaria-babes'. Legally speaking marketing techniques are often covered by numerous laws, so each marketing activity has to be looked at individually by jurists. Preferably one consults a legal consultant before undertaking any activity.
Nowadays one starts with a new phenonom called called viral marketing on social networks...
Have you come across some examples of such marketing activities lately? Or are you planning one and want some legal advice? Tell me and we'll let it work: djrsterenborg(#)gmail.com
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P.S. I am currently preparing a legal article on ambush marketing activity of car wiper advertisement, but maybe some of your examples are more interesting...
(1) http://www.entrepreneur.com/encyclopedia/term/82168.html
PHOTO CREDITS: http://adsoftheworld.com/media/ambient/nintendo_dsi_brain_teaser by Ogilvy
PHOTO CREDITS: http://adsoftheworld.com/media/ambient/nintendo_dsi_brain_teaser by Ogilvy