There is another problem with why many teens can do things OTD, which I have seen countless times.
Don’t take this the wrong way, but when someone is the 4th child out of 11, let’s say, they really are free and on their own for a good part of the week. Telling parents they are going to a friend’s house or to work or something seems to be enough of keeping tabs.
Groups of frum teens are totally unsupervised for too long a time and they are no more immune to
the yetzer hora than the rest of us.
While large families are for sure a blessing, B”H, two busy parents, doing all the right things for their family, just dont have enough hours on the clock to inculcate values and have a one-on-one rapport with each child.
I dont know what the answer is. Perhaps recreation centers or something. Perhaps limud kodesh education with deeper understanding that each subject is not just a subject, but a way of life.