I'm imagining huge machines trawling the landscape, chewing up beaches and scouring forest floors, controlled by bots that automatically guide them to the nearest plastic recycling depot where they disgorge their contents and then move on. They'll be powered by burning plastic and will thus be self-sufficient, albeit enveloped in toxic clouds of pollution. Occasionally one will lose Internet connectivity and rampage through a small village in the developing country in which it operates (deployment in Western countries will be prohibited), obliterating shanties and the occasional elderly person, baby, or otherwise slow-moving human being.
The machine clean-up proposal - once appropriate lobbying efforts by the corporation making the profits occurred - flew through Congress with only a token protest vote.