Hipsters care a lot about signaling that they prefer fringe/niche/"non-mainstream" culture. Since it is all about social signaling rather than actually enjoying

Hipsters care a lot about signaling that they prefer fringe/niche/"non-mainstream" culture. Since it is all about social signaling rather than actually enjoying a wide variety of culture, it is just as important for them to signal what culture they don't associate with, and that is decided not by the quality of the music/film/food itself, but rather based on whether other people why enjoy it are "down with it" or "mainstream". Radiohead is a pretty popular and well-known band, so you have to pretend you don't know them, while at the same time disparaging them - not for anything related to their actual music, but for the people liking them not being hipsterish enough. This is the epitome of hipsterness.