Suggestive Street Signs
The 'Have Fun' street campaigns feature hand and footprints on sidewalk and sides of buildings. You really just have to take one look at the pictures to know why so many people are stopping to look. Effective marketing from Oohtique.com for sure.
Implications - Guerrilla campaigns (if chosen to be used) have to be cleverly delivered and work for your company. Ideas like Oohtique.com's 'Have Fun' campaign manages to capture the audience's eye while still maintaining true to the brand and its target demographic.