The printed posters offer 'Free Second Hand' trash. The images are of used gum, smoked cigarettes and empty fast food wrappers. Each one has a 'Free' message followed by, "Nobody wants your litter. Bin it."
Implications - This is the kind of municipal marketing that serves as a reminder to the public that they often spend times in public places, and they should behave with a certain base level of decorum and respect for their fellow man/woman. I get a kick out of it because it's a newer, more subtle form of public shaming into better behavior.