Not sure if trolling, though comment has been reported.
I must cop to the limits of my own experience in Japanese linguistics, so third parties who know more by all means jump in, but I will argue to the consistency of what I have witnessed or what I can easily research at the very least.
If "Baka" were primarily an adjective, you wouldn't ever attach an honorific suffix to it as you're suggesting here.
All of the sources I can find confirm that the primary use of Baka is as a noun.
Sources in anime of one character screaming "Baka!" as a single sentence to another character are legion, and the intent is always as condemnation of the person spoken to: EG, "you are at fault" and never as condemnation of the things the person said: EG, "the thing you just said is nonsense".
So presuming you're not just pulling our collective fins, this is a distinction I would like to learn more about if you'd be willing to share or offer some links? :3
Hmm, for those who aren't recognizing the reference: http://fuckthisgayearth.com/ . It's just a memetic comic strip made by DA:iLikeCoolStuffz that illustrates a similar pair who reject themselves prior to trying to make contact. :J
http://www.funimation.com/shows/the-disappearance-of-nagato-yuki-chan/videos
It's currently airing in Japan (ep 8 aired this week) during the spring season so it's being simulcasted with subs by funimation on their website (linked above). They also recently announced they will start dubbing it with the entire original dub cast from the original haruhi dub bandai released ages ago if that's more your thing. I think you can still watch all but the most recently aired episodes without a subscription, not sure. If not, you can always view it through other means....
I quick lookup in a dictionary will answer all your questions. There's no need for speculation, it's really well defined here.
Finally, baka senpai is definitely wrong.
Apparently we come up as a subject sometimes :J
Also 2015 sounds almost as long ago as the nineties for some reason. I blame the singularity or something. ;P
Sorry I just finished haha Yandere Lovers