Utility boxes and street signs are the most popular targets of graffitists in Georgia's' Gwinnett County. Source: Gwinnett Clean & Beautiful
Graffiti is best controlled when residents are encouraged to report it and volunteers help public works remove it. Though highly effective at removing just about any type of paint, pressure-washing should be limited to tough surfaces such as concrete and hard woods.
To keep taggers from making public surfaces such as viaducts (above) into a canvas, former St. Alberta, Canada, city engineer Dwayne Kalynchuk championed efforts both there and in Victoria, British Columbia (below), to create skate board parks that encourage graffiti. Photo below: Dwayne Kalynchuk