> If you just shrug it off as “bullying”
It is literally bullying
> I suspect that at some point between the age of 13-19 as in this case there should be more serious repercussions.
Child development doesn't advance on a set schedule. Kids at the same age can be at vastly different levels of maturity and even older kids often make stupid choices carelessly. It's part of growing up. Their brains are a work in progress and that applies most to the parts that help them make good choices (https://www.aacap.org/AACAP/Families_and_Youth/Facts_for_Fam...).
That doesn't mean that kids can't make good choices, but it does mean we need to expect them to make terrible ones from time to time. As adults, it's our job to show them how they screwed up and set them right, but destroying their lives when their brains let them down isn't helping anyone.
Children need teaching and guidance as they grow up, not prison sentences or sex offender status. We gain nothing by treating children like criminals for acting like kids.