Either that, or have separate webs for different disciplines (maybe one for academia, one for arts, one for jounralism, one for programming, etc.) that are kept

Either that, or have separate webs for different disciplines (maybe one for academia, one for arts, one for jounralism, one for programming, etc.) that are kept separate from each other. I'm not sure how it could be implemented, but a forced partitioning like that could probably serve the same purpose without gatekeeping (if the partitions are small enough).