Hipsters!?

The popular conception of a "hipster" is a stereotypical image constructed by non-hipsters who didn't know what being "hip" meant.
Since this image got passed around as being "cool", folks who wanted to be "cool" started imitating the look and attitude that they all heard about. These people are posers.

In my personal opinion, a true hipster is someone who is very fond of unusual and not necessarily popular things, such as music, fashion and food that don't get talked about in places like, say, the Los Angeles Times. They don't care what other people think, but it's not snobbery. It's a passion.
I've met very many people who I would describe as "hipsters", but they don't wear ratty clothing or horn-rimmed glasses at all.
I don't even think it being unpopular or non-mainstream is a prerequisite.

There's also the misconception that being into something "ironically" means that they don't like something's face value- that their liking it is insincere. Irony in this context means that while the thing you like is superficially unsophisticated, you like it anyway- DESPITE of its cheesiness, and also BECAUSE of its cheesiness, and at the same time you're tongue-in-cheek about it. You KNOW it's cheesy, but it's fun as hell, and it has better qualities under the surface.