I have quite the opposite experience if you wish. I was never personally abused or treated unfairly by the cops during a stop. But, I still distrust cops. If anything because of the ones I met in an informal settings. In my extended family and network of acquaintances there are 3 cops. And 2 of them physically abuse their wives and kids, are very brutal and scary. In fact if I didn't know they are cops they could just as well fit the profile of street thugs.