To give you perspective of my position, in my world I constructed a vast archive to help humanity better itself. However, humans frequently used this knowledge to gain the upper hand and destroy one another. In fact, my knowledge nearly caused the destruction of an entire race on more than one occasion. Thus I banned humans from my library.

I do not trust them here any more than my own world, but I am allowing this library's continued use since this is a different world. But under careful supervision. It is for everyone's own good, and unless every person is proven to be trustworthy and these shifts are no longer a factor, these rules will remain.