I'm not sure that quite fits what I'm describing. AIUI, those phenomena describe tearing down someone perceived to be rising above his station, whereas I'm describing the subtle enforcement of segregation by class. Namely, these people werent punishing a member of their group with "pretensions" to a higher one (a disgusting enough impulse), they were trying to tear down someone who they already thought was of a different group (unintentionally imo: these were fairly close friends and there were many ways that they connected very deeply, which made these cases all the more noticeable).
