If they become truly regenerate they'll be doing the walk right, talk right, "act" right thing.
Eventually with the right guidance. But they're getting pounded with the "good works" without any form of regeneration. And the adults are wondering whats wrong.
I was 21 before I realized I could be forgiven. I honestly thought I was hell bound and there was nothing I could do about it because I wasn't the perfect little goodie two shoes they wanted me to be. It wasn't till then that I learned the truth of the Gospel.
So I have to empathize with the kids on this one. They are either leaving legalism or there is nothing for them there.