Will people throw their trash back on the sidewalk after we've cleaned everything up?

Video Description

Hello everyone watching the video! Today we returned to Hue city, Vietnam, to continue cleaning the sidewalks in the abandoned neighborhood for 20 years, we were surprised to see a huge amount of trash under the grass, probably people had thrown it many years ago and the grass had grown over it. While cleaning, a neighbor brought us some sugarcane juice. 2 people worked until evening but only cleaned half of the sidewalk and had to go home, next time we will come back to continue. The people here were very surprised to see us clean up the trash on the sidewalk, but will they throw the trash back when we have cleaned everything?