All those customs that we associate with patriotism are common among the working class, including working class kids. This is, in large part, why these practices are looked down upon those by the people in upper income strata who reject them. It's "Cow Country" behavior and simple-mindedness. As a wise man once observed, you never see the kids in trade schools protesting the flag or the anthem or America. It's always the kids in four-year schools, and, most heavily, kids in elite private universities doing this virtue signaling.