Not convictions (you know who you are! ) but interactions good or bad with the boys, girls and LGBTs in blue.
When I was about 14 (around 1980) I was with mates drinking a couple of cans of Skol in a local bandstand in a locked park. Someone shouted 'cops' and we all ran. My mate, who was a county level runner got caught. I couldn't leave him on his own so I went back and 'surrendered'.
We weren't arrested but were handcuffed and taken to a police station where we were sat in a room for what seemed hours and then taken home. It turned out that there had been recent burglaries in the park (or that's what the police said when they told my mum I hadn't actually done anything).
Thinking back 32 years, I don't think the bobbies even mentioned I had been taken to the station, or that I had been drinking, and funnily enough - neither did I.
I seem to remember that it gave me a positive impression of the police.