Similarly to how Austin banned single use plastic bags. When I visit other cities, I notice them everywhere, stuck in fences, trees and bushes, along roads, under overpasses, etc...
And where people care about keeping their town clean, tax money gets spent on removing the tumbleweed[1]. Which is why these bag bans are a general good thing.
Source: http://1bagatatime.com/learn/plastic-bag-clean-costs/