Wikimini offers a way for users to communicate with each other on talk pages and public forum. This includes receiving notifications when a response is received.
The wiki currently lacks any mute or block feature beside moderator reserved tools. This prevents users from witholding from unwanted interactions.
The extension currently used, LiquidThreads, has a notion of message semantisation, as in messages are linked together and thus the extension probably has a way to "know" that you are reponsing to a user or not (for creating a block feature). The notification system can also be modified in order to have a mute feature.