Dog plogging has been growing among dog park regulars and some cleanup groups. Some local businesses have been incentivizing the idea with gift cards, swag, and other rewards for participants. Likewise, there are sponsorships to help spread the word that a cleaner city benefits everyone.
Today, many people are leaving food behind while hiking on purpose. Why? Maybe they think they're helping by feeding the hungry animals? Perhaps they don't want to carry their leftover food on the rest of their hike, and tossing it seems harmless.