I think that very much depends on where you grew up. I grew up middle of nowhere Wisconsin and we were definitely drinking and throwing parties (even with parents home) at 15. All it takes is "cool" parents that accept kids are going to drink and want to provide a safe spot for it (especially taking all the car keys), or someone's older brother who will buy the alcohol and drinking after the parents go to sleep.

As someone from a coastal city, can confirm that the same things happen back where I'm from. There's always the friend with the chill parent and the college-aged sibling who can buy. Uber, Lyft, and/or a DD make it easy enough for the kids to make sure everyone can get home safely.

>There's not much going on in high schools, 15 years old kids living at their parents who can't even buy alcohol.

I was doing hard drugs in house parties at 15 and I was one of the older ones. I had a friend who had to have his kidneys replaced by the time he was 16 and knew of 5 girls who had abortions before they were 18.

There is plenty going on in high schools.

So laws and parents are stopping teenagers from drinking and having sex? When did that happen?

Plenty of people sneaking out to get drinks or get high when I was 16 years old and in highschool (8 years ago).