Speech Bubbles
This guy printed 50,000 speech-bubble stickers and has been smacking them on ads across New York City for the public to fill in.
It’s a fine idea. Folks here are forever scribbling their own speech bubbles on public ads, using a pen or permanent marker, particularly on the paste-up posters in the subway stations because there’s nothing better to do while waiting for a train and they’re much easier to write on than, say, bus stop ads, which are encased behind a plastic window. But these stickers let you deface any public ad! It’s like New Yorkers’ very own New Yorker caption contest, but everyone wins.