I think ditching young and "in moral danger" family members used to work, but that's when there were jobs and no billions of $$$ porn industry, when a lot of cops were good Catholics...before such a dismaying breakdown of society.
The risks in the US are too great for this these days, IMO. The realities are prostitution, drug addiction, AIDS horrific abuses in the juvenile justice system, enforced psychiatric intervention, etc. Suicide is very common, also.
From what I have studied, most youth grow out of their waywardness after about 4 years. I think our trad families are too much under the gun as it is; I think we need to circle the wagons and say , 'these kids are messed-up, but they are our young Catholics, we need to keep them as close as Our Lord will possibly permit".
I mean, look at what would happen in many states if they got the corporal punishment they might richly deserve--we could have all the kids removed. Everything is too unsafe out there.
Prevention, such as the 9 First Fridays & 5 First Saturdays when they're younger and more innocent will help; we have Our Lord's promises attached to these devotions.
I really do understand John Grey's point of view, but I just don't think it turns out well in the US.