2. The method of claim 1 , wherein the first or second document is located in: a web page external to the social-networking system; or an application external to the social-networking system.
1. A method comprising: by one or more computing devices of a social-networking system, receiving a reference to a first document, wherein the first document: comprises a content item and a first interactive feature for user posts, wherein the first interactive feature is displayed as a conversation thread; is associated with an entity; and is provided from a first web domain; by the one or more computing devices, selecting a second document that corresponds to the first document, wherein the second document: shares a common content item with the first document; comprises a second interactive feature for user posts, wherein the second interactive feature is displayed as a conversation thread; is provided from a second web domain; and is associated with the entity; by the one or more computing devices, receiving a user post related to the content item, the user post being submitted in connection with the first or the second document; and by the one or more computing devices, updating the first interactive feature and the second interactive feature with the user post, wherein the updating comprises: synchronizing the first interactive feature and the second interactive feature at the same time; and automating a synchronization of a moderation of the user post in connection with both the first and the second documents based on a set of banned words or character strings, wherein automating the synchronization of the moderation comprises: filtering out one or more words of the user post in connection with the first document based on a first moderation rule of the first web domain; and filtering out one or more words of the user post in connection with the second document based on a second moderation rule of the second web domain.