As much as I'm opposed to tax-funded, government-provided security and investigative services most of my personal experiences have been neutral to good.
Once, while coming home from a party we, including the driver were not only underage but drunk out of our gourds. We get pulled over by LASD deputies because of bad driving...and let go without even a warning. Another time hanging out at a beach, still underage and, yes, drunk some Torrance cops rousted us, refused to look at the ID one of us offered to show them and insisted we get in the car and leave.
Yet another time at a house party...still underage and drunk deputies show up and don't even hassle the homeowner despite the fact that he had a houseful of drunk teens about. All they wanted was for us to quiet down. So yeah, things have worked out for me.
Don't get me wrong I'm disgusted by the dog-shooting, wrong-door raids, sense of entitlement, and tone-deaf responses to outrage etc. and have had a few bad experiences but it's not all bad.