Many are given publicly. Consider an illegal strike. Even a legal strike by schoolteachers sends a message of disregard for the students. The strike always is designed to get the attention of both parents and school administrators by interrupting the school year and threatening the education of the kids. Then the unions have the audacity to claim that their action is for the benefit of the students.
Businesses are just as guilty of teaching negative attitudes, as are the unions.
When the price of gas goes up for the weekend and back down on Monday, children learn it is acceptable to take advantage of people for their own gain. When an advertisement misrepresents an article, the technicality is lost on the child who sees only the lie. When shoddy merchandise is sold, the child learns that carelessness is acceptable. When the clerk is rude, rudeness becomes acceptable. When the parent responds with rudeness or profanity, these actions become the standard for the child.