You know Atlantis I like analogies, so i will give one here.
I have a great deal of exposure to large metropolitan cities of the USA, NYC/NJ, South Florida (Miami), Los Angeles, Chicago, etc. Although in recent years, especially currently--there probably never been a time where police and law enforcement actions have come under scrutiny! But my point here is the bums, homeless and less fortunate people that are reduced to live in public places, whether alley ways, parks, near rivers and streams, etc., etc. No matter their background, the reason for their misfortune or their current mental and medical conditions--it is a fact of life in any larger metro area. How they are treated is solely their own doing 99.99 to 100% of the time. There are quite ones that truly mind their own business and do what they have to do and are completely respectful, courteous and mindful of any other person they happen to come into contact with. Then there are the aggressors, the trouble makers and the "it's not my fault i lost everything and i got hooked on drugs and my family left me and i lost my home' type of people that cause extreme problems, threaten, destroy, steal and generally are a blight on wherever they are at.
Each type of those less fortunate persons causes their own path of resistance when a police officer rolls up on them for whatever reason.
Have you ever seen Dirty Harry pick out a nice tourist say from the United Kingdom with a camera hanging around his neck and a city map in his hand deciding whether to go into the museum or shopping mall he is standing in front of with a puzzled look on his face, and pull his lovely long nose 44 and ask him if he felt lucky???