This is really a very bad habit nowadays. Where ever they want they stick handbills and posters on public properties they don't even realize their mistake that actually it is spoiling their city's beauty and also it very unpleasant to see. they can solve this problem by adding their posters in newspapers, in the net and in many sites and many more things this will save the city from becoming dirty and also the city will more beautiful.

Hope this helps:)
49 4 49