Haha my parents did similar shit but wouldn't admit it. We were never close and our relationship was more like roommates who found each other on Craig's List than parent/child. I was actually a really good kid, got straight A's in a college-prep school that I attended on academic scholarship, had been working after-school jobs since I was 12 so I didn't have to ask them for money, my friends and I would drink on occasion but never into any drugs or really up to any serious trouble. But my parents were still super suspicious of me and demanded perfection, like after I'd done my dad's laundry if I didn't hang it up in his closet exactly right I'd be punished. So they'd try to do sneaky things to catch me being "bad", but refused to admit they were being sneaky. They set up motion-sensor lights outside my window to catch me sneaking out at night, but I just used a window on the other side of the house if I wanted to sneak out to see my boyfriend late at night. They'd go through my trash- which I took out myself, so they'd have to go to the big outside garbage can to dig through. Once they found birth control, and tried to say "I was taking out your garbage for you and noticed this", but I just said I'd emptied my own garbage so I knew they couldn't have found that in my room so they couldn't prove it was mine. Once they found a bill from a hotel I'd thrown a party at (I had my own bank account/debit card so they couldn't see it on their statements) and since they already knew the garbage story wouldn't work, they tried to say the hotel had called asking about a room charge. I'd given the hotel fake information so I knew that wasn't true and questioned them about what the hotel wanted, and finally my dad blurted out something about how the hotel had even been given the wrong phone number and I was obviously trying to hide it, and I was just like "How'd they call if they had the wrong number?" If I could make a valid case like that, they wouldn't punish me because they didn't want to admit to their snooping.

I mean it wasn't a great family life and I'm in therapy now and all, but I've always thought it was funny that my childhood was basically a bunch of double agents living together trying to outsmart and one-up each other. It turned me into a very clever and quick-thinking adult!