A community is constituted by the persons present in a library, she determines the conditions for members inclusion and exclusion.

For exemple it can be required that every person be present one and only once, inhabit a particular place, be of a certain age, be member of an association, do not propose spam or advertising, do not attack other participants... or on the contrary everything can be permitted, signal being separated from noise through community choices.

By default, a person and what she does are anonymous, she can decide to be public or anonymous, but her public acts remain so.

A library requires maintenance, material, a physical access and an address, the entity controling those aspects is the administrator. No rule apply to him except the number and quality of participants in -his- library.