Outside of taking care of a child's physiological needs, their parents are providing a small proportion of the inputs which go into a child's system of being. Peers, teachers, elder family, media, the economic system [and it's insatiable desire for consumers and tools to leverage the consumers], all conspire to forward agenda that often don't align with and support being a good citizen.
If your children act the goat, not only are they disturbing others, they clearly have not be told, nor understand, why they are there.
Also, I’ve been using the em-dash since the late 90s.