Hi! Actual gay man here. Yeah, the whole idea of splitting queer sexuality into "tops" and "bottoms" is hella problematic, but it's also not just fujoshi. It's a Western thing too. It's extremely prevalent in Western porn, and in the general presentation of gay men and women within the media. Either way, just rambling about how yaoi fetishizes queer people isn't going to help anything. Honestly, if you're going to complain about the fetishization of queer people, you're going to be complaining your entire life. If you have a problem with it, then do something about it. Support queer representation and queer authors (there's a mangaka called Mentaiko who's a gay man who makes BL manga, and he's a great place to start). Don't just randomly complain on a forum about how fujoshi are fetishizing queer people; it will solve nothing and just make you look like an fool desperate for conflict. Also, I need to ask... Have you read any yaoi manga? Because the good ones typically ignore the false dichotomy of seme/uke as well as the strange heterocentralism present in the idea of the feminine bottom and masculine top pairing. Like, even the one you're commenting on doesn't really follow that trope.
Wow this went on for a while. Anyway, thank you for coming to my Ted Talk.
As a few others have pointed out, I never said that identifying as a top or a bottom was in of itself problematic - what is problematic is expecting a strict adherence to these roles from every queer person, as well as seeing sexuality in such strict binary terms with no wiggle room. What is problematic is people expecting one's preferred sex position to, for some reason, correlate with gender presentation (y'know, that old stereotype of feminine bottoms and masculine tops).
Also, never said it was a "western media invention" - I said it wasn't just in yaoi, since the original poster only directed his statement at "yaoifangirls". Honestly, the terms have probably been around since humans have. The problem only happens when queer sexuality is restricted to only those two things, especially since it tends to come with the weird feeling that I also get when people ask me if I'm the woman in my relationships (No, I'm not. Neither of us is the woman. That is the POINT).
All these yaoifangirls thinking being "uke" and "seme" are fixed descriptions on how homosexuals are going to be - are retarded. Stop fetishizating homosexuals for your own sick amusement. Making a guy feminine and then having a arrogant asshole "manly"-guy fuck him, is not how this works. - It is just a fucking facette of the whole picture.