I would like to think every certified teacher has, as least, taken Sociology 101. The type of dress is a long observed cultural standard that provides structure in most professional settings and defines the status of individuals within that structure. Thus, the "white hats" or the "suits". Only in the lib/prog mind would this be considered subjugation. Like poor parents that seek to befriend their children, teachers who want to look like the kids surrender the respect and authority needed to maintain a necessary societal hierarchy. But, with the unions, it's always about them and to hell with the rest of us.