No. The problem arises when it is the ostracization of a select few.
SnakeDoc
you use a value-laden term. any non-invitation constitutes OSTRACIZATION?
There is no evidence that anything but Constance’s prom was targeted, or that the few who went to Constance’s prom were targeted for shunning (if they were, we would hear them complaining in the news as it would make Constance look even more sympathetic).