Honk If You Love 'Art Cars'

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Harrod Blank likes to stop his van in front of a bus stop, click on his small public-address system, and say, "OK, everybody, say 'cheese.' "

Jaws drop. Mothers clutch small children. Grown men groan and smile. Teens say, "Cooooool."

Mr. Blank's 1972 Dodge van is covered with cameras, 1,705 of them, glued carefully in rows and designs on the van's sides, back, and front. To sidewalk crowds from California to New York, this apparition of van-dalized cameras is at first seen as the work of some wacko with too much time on his hands. Then people warm to it. Mr. Blank's enhanced van, and hundreds of other cars decorated with unlikely objects or painted with murals or …