@ShadowofOblivion It's alright. This thread has been admittedly heated.
But in the interest of staying on topic and furthering the discussion, I wanted to add that the academic tune of the recent replies just points out how creating an "LGBT appropriate tag" would be difficult to implement, use, and understand for most people. People can't even agree on a definition as to what should be in such a tag and the current plethora of manga up on the internet isn't always so clear cut. How can an uploader or dev know what tag to use? Should Bara/Gei-Komi be used if the author is a member of the community? Should it be based on art style alone? How many uploaded works would even fall under the tag?
While admittedly, the yaoi genre seems to have been overtaken by a negative view due to fujoshis, the genre itself hasn't been stagnant. It's been evolving to the point that even members of the community find it easy to sympathize with the characters. Some have even begun to see it as a side of the same coin (with yaoi as the "more romantic" form and bara/gei-komi as a more explicit one) [there are scholarly articles on these by the likes of Thomas Baudinette and Nagaike Kazumi that explain this better than I ever could]. And I want to point out that while Yaoi has been predominantly made for females, it has also helped pave the way for LGBT content. It makes it easier for authors to circulate material to the general public and even provides people who wouldn't normally be into this kind of media with an introduction of sorts.
Anyway, that's my take on the academic discussion currently going on. But I think that the fact that yaoi is an evolving genre with various kinds of works is what makes it work as a tag in this site. Adding Bara/Gei-Komi wouldn't really help, in my opinion, since people can't often tell the difference and this is a relatively obscure subgenre. Not even the academic community can find a specific definition since manga is a dynamic media.
MD is also primarily a site made for reading and hosting manga. The tag system being simple and concise helps make it effective as a site like that. MangaUpdates is a much better site to look for specific content (and they even use a Bara tag, though not Gei-Komi). I also want to reiterate that recommendation lists or social media posts can be used if a user was looking for a specific type of content. Alternatively, a user could look for a scanlation group that caters to this kind of subgenre, join their server or look for their scanlated works.