Managing content interest data using peer-to-peer logical mesh networks. Instructions may be processor-executable to implement a given logical node of a logical mesh network that includes a number of such nodes. The given logical node may be configured to store identifying information of its peer nodes. In response to detecting a message-passing event, the given logical node may be configured to generate and convey an outgoing message, which may correspond to respective network-based content and may include indicia of the content, to its peer nodes. The given logical node may not convey the outgoing message to any node that is not a peer. Dependent upon indicia of network-based content included in an incoming message received from a given one of its peer nodes, the given logical node may be further configured to update its identifying information to add or delete a particular node as a peer node.