I was thinking of this lately, (a longish story why that I'm not going to post) but I can say for both me AND my ex, no.
To give an example, we didn't hang out with bad kids, but for the most part their parents were pretty lenient when it came to the senior year of high school partying phase. If you looked at a video from our pre prom party, every single person had a drink in their hands except me and my ex, because our moms were there and they would not allow it. And we knew it. When we got to our destination afterwards, I had to call my mom from a pay phone (no cells in the dinosaur years, LOL) who in turn called his mom so that they knew we were OK. We had curfews and rules and we were not allowed to have "people over" or drink. We both valued our parents and their perceptions of us, which is why it was so hard for us to tell them we were in trouble.
The ironic thing? BOTH our parents were more lenient with us when they knew we were hanging out together. I had my curfew extended when we started dating, and it was fine if I was home, in his car outside the house. (and no, at that time we weren't doing anything!) When my ex and his friends got in trouble doing typical teenaged boy things and he got grounded, he was allowed out of his house if he was with me to go to the movies and stuff. I guess they figured chances were we would stay out of trouble together.......
Truth is we did stay out of trouble for the most part. When I got pregnant, it was during a period where we were having a lot of problems, breaking up, and moving on with our lives, figuring a lot of stuff out and rebelling a bit in general. We weren't even sexually active with eachother that long (a few times in a few weeks) before we broke up for good.
I don't think our parents could have done a thing differently. And to be honest, it touches a nerve when people question my upbringing or my morals because I got pregnant at 17. My parents raised me well, and so did my ex's. It just takes once, you know?
Not that I'm insulted by your question T
I actually think it's a good one!