LOS ANGELES (CBSLA.com) — A San Francisco man hopes a little humiliation will make drivers put down their phones.

Brian Singer created the site TWIT Spotting, so anyone can post pictures of drivers caught texting behind the wheel.

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Some of the photos are now plastered on 11 billboards across the Bay Area.

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All the photos taken by Singer were done while he was riding as a passenger, which he urges others to do, as well.

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