Hmm, I don't understand this, but I've never had to mess with BSAs before. This was never an issue in Morrowind modding as we had pretty good modding conventions established that most people followed, such as placing all your mod's resources into a folder named for the author (so you could find anything from me by finding the JCSpencer folders in your data files). If you wanted to delete my mod, all you had to do was delete my folder(s) and my .esp. Pretty easy. And this method also had no chance of overwriting anyone else's stuff.
Well it isn't hard at all once we have a proper mod manager. Then it doesn't matter. I never played Morrowind, therefore I have no experience using mods for it. With oblivion I don't think you can just name a folder and add stuff to it (Textures and so on) you had to place them specifically in the mesh folder or texture folder and so on. I could be wrong, and if I am, your method of naming a folder with the author is excellent! So could someone enlighten me if this is true for oblivion?