Maybe you and I have vastly different experience with police. Disclaimer: From a rather small US state.

Your other note is also well taken, it does however not imply that anything a kid or teen does is OK or automatically positive.

Finally, it's OK to be suspicious. I am too. What I am saying is that one cannot just make the decision "all cops are evil or must be treated as such" and then hope for a good outcome in all cases. I argue it's a better policy to keep an open mind and decide on a case by case basis.