It has been happening for years all around the world. This report was from 2011!
Lisbon residents launch campaign to end `dog poo plague’:
The group also aim to collect as many photos of dog poo as possible in the next three months in order to create a giant canvas to be hung from a building in the capital, to raise further awareness of the problem. Photos from cities other than Lisbon are also accepted, but the group asks that people send in a caption identifying the location.
Sadly, the linked site http://www.noshitreport.org is no longer around…