No worries, I am glad to hear your questions. Currently BookFusion does not allow sharing. We are currently focused on improving the reading experience for DRM free ebooks that users currently own.
Ebooks are only copied and associated with the user that owns the ebook that they uploaded. No additional copying of ebooks are done.
Its no different from carrying a copy of your ebooks on your thumb drive because you would like to access them on either someones else computer or on the go