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PHOTO ILLUSTRATION BY MARTHA HERNANDEZ / MHERNANDEZ@STARADVERTISER.COM Provocative ads on numerous issues — abortion, religion, atheism, sex, drugs and spying — ignited outcry when they appeared on U.S. buses, subways or trains over the past year or so.
WWW.MARIJUANA.COM Provocative messages, such as shown here on a city bus in Portland, Maine, have been at the heart of recent lawsuits or disputes over allowable advertisements on public-transit properties.
PHOTO ILLUSTRATION BY MARTHA HERNANDEZ / MHERNANDEZ@STARADVERTISER.COM The topic of controversial content has particular resonance in Honolulu, which a decade ago kept a pro-life group from displaying images of aborted fetuses, thanks to a city ordinance against aerial advertising and Hawaii’s statewide billboard ban.