I haven't had too many bad experiences. No curfew here but when I was younger--if I was out past midnight and a cop saw me; I was getting pulled over.
The worst I ever had:
A friend and I met up at a taco fast food joint and were meeting up with our SOs. He got food and I was sitting with him in the car. A cop drove by and I joked about them pulling us over. Yeah...they ended up doing it. We were confused as all hell--we were just sitting there. They had us come stand in front of their car with our hands away from our body while they checked our ID's. They claimed the music in my car was bothersome and I should go turn it off(I had been in my friend's car when they came up and had left the music on in mine while we waited). This was bullshit--the windows were up and the music was on low (I didn't have a sound system and wasn't in the car so the music was on low). The cop followed me and, when I opened the door, he was clearly looking in my car. I told him he could just look in it and he quickly started saying that he didn't ask to blah blah. They claimed the restaurant called on us for loitering. (1. The workers looking at us from the door showed they were confused as well 2. I knew someone who was working there who told me that this was bull).
They had no reason to bother us. They had no reason to have us stand arms spread in front of their car while people drove by (embarrassing as hell). They lied about why they were talking to us. They found nothing.
Just a couple of bored cops in the burbs where nothing ever happened. They just had a hard on for finding some teens with weed or something.