Rippled structures should prevent people from attaching stickers onto objects. Here some examples from Seoul/Korea (traffic-pole) and Linz/Austria (garbage-bucket)
Photo CC by Björn Sahlberg
Cobble stones, metal grids used on rooftops and staircases as well as soft ground materials are ideal structures where people with high-heels will have a hard-time. Fashionable victims risk ankle sprains and/or loosing their footwear. Interior architects might rethink carefully their material based on their clientele. The city of Lagos informs their visitor for “unpleasant” high-heel experience in its old downtown full with cobble stone.
Photo CC by http://empowerment-gateway.com/