But James Griffioen, a Detroit writer and photographer, did notice the murals late last year, which prompted him to post photographs and a little backstory on his blog, Sweet Juniper.
Post photographs to your Facebook page?
Members also post photographs of themselves, sometimes hundreds of them.
People post photographs of it on Twitter and Instagram.
Some sites also let people post photographs or audio snippets.
Lawsuits sometimes exact payments from men who post photographs or succeed in shutting down a site.
Often, though this is not required, they also post photographs of themselves.
Twitter, for example, does not allow users to post photographs and video, but Sina Weibo does.
It is unlawful to post photographs or other copyrighted material without the permission of the copyright holder.
City officials in Oakland, Calif., and a neighborhood association in Omaha post photographs of such offenders on billboards.
One cyclist has started a Web site, nyc.mybikelane.com, where people can post photographs of motor vehicles in bike lanes.
