Is the ban logical?

City authorities in Xi'an - capital of Shaanxi province known for its Terracotta Warriors - reportedly issued a ban, prohibiting people from collecting items from litterbins and garbage piles.

Not that there is anything important, or valuable that the local officials do not want others to share. They just do not want to see a mess after people pick and choose what they want.

Here is the argument: There are upwards of 500 garbage collection facilities in Xi'an, most of which are located in densely populated communities. In spite of repeated bans, people continue to collect recyclable items from these places, resulting in second-time pollution.