Here I am, rounding the corner of 28th St. and Park Ave. in New York when, suddenly, I am hit by a guy coming at me with a flier for a local deli. A polite "no thank you" did no good — this last link in the marketing chain was listening to his iPod. Of all urban advertising vehicles, the people handing out fliers are definitely the most disruptive, much like a pop-up window that spawns an endless cycle of new pop-up windows.