you are doing it wrong. very wrong, if you think that's a police problem.
recently the former, most retarded, mayor of Sao Paulo used police on the city's 'tenderloin' (called cracoloandia ...literal translation to crack-land... you get the idea) it resulted in a city wide chaos as those figures, usually restricted geographically and living with their own morals and codes, scattered all over the place and freaked out when found in a situation worse than they were already at, resulted in far worse crimes than the littering they were committing before.
recently the former, most retarded, mayor of Sao Paulo used police on the city's 'tenderloin' (called cracoloandia ...literal translation to crack-land... you get the idea) it resulted in a city wide chaos as those figures, usually restricted geographically and living with their own morals and codes, scattered all over the place and freaked out when found in a situation worse than they were already at, resulted in far worse crimes than the littering they were committing before.