more to the point, theres the common flattening effect, a deflated feeling, that you get when you see a version of yourself mirrored back in the reduced form of a stock character, its the heightened sense of being a targeted demographic. lots of the time seeing the fraudulent, cliched parts of yourself is a funny and healthy thing to do, its the main point of having friends, but sometimes it can really take the wind out of you.
This has probably become more prevalent with the types of archiving the internet provides, the feeling that there isn't an underground in the supposed former sense of the word, that "alternative cultures" are more clearly coopted and supported in a far franker way by the evil doers than they perhaps seemed to be in the past.
Shiels do you get this sense specifically from a personal encounter? I had it quite a lot from internet radio mixes, especially when they were really good, and i enjoyed all the recommendations. I could get a bit despairing after listening, the recommendations felt too particular, too choice that there was something sinister and a little depressing about it. Maybe theres some untreated puritanical impulse behind that because it felt gluttonous. One of the best thing about dance music is when it feels completely impersonal, inhuman, unartistic in the romantic auteur sense, its a very inviting and accepting field in that respect, theres the liberating feeling of being an infinitely small particle in a huge disinterested machine. But the feeling i'm talking about in response to too many accesible online mixes, endless archives and playlists that you never remember, the frailty of them not being physical things etc, doesn't give the kind of freedom of being lost in the crowd, it feels perhaps creepily personal. you are very bluntly made to feel like a customer. or not.