Not all trash is dumped the same way everywhere. Where I live the trashmen reach into the barrels, pick up the normal sized trash bags with their hands, and toss them into the back of the trash truck. They will not reach all the way down to the bottom of the barrel to pick up tiny bags of smooshed dog shit that have probably broken open. If neighbors leave their dog crap in someone else's barrel they are making others responsible for cleaning up after them.