The parents are ignored\abandoned. Their children just leave. My experience has me thinking that many of the “participants” were attractive enough, but not smart enough.
They wind up as runaway prostitutions. That’s simplified, I admit; my observations.
I ended up running a de facto crash pad for homeless kids some years back in San Jose.
The stories were legendary on the old FReoples threads.
All started when I needed a couple roommates to make it through a long patch of unemployment. I got two homeless 24 year old women. One had been taken downtown by her mom, given a blanket, and kicked out of the car when she was 12.
Their friends would come by.
Mostly the kids were OK, the adults, not so much.
They'd do laundry, shower, get a few home cooked meals, and most precious of all, get a couple night's sleep unhassled. All cleaned up and refreshed, they go get jobs!
For years afterwards every once in a while one of these kids would show up on my doorstep just to thank me. I did so very little, and they'd go out of their way to thank me!