Kevin Beaumont@dangoodin doesn't look like it's a feature. If you posted something, you can mute responses to it (I do this all the time if something goes viral), but it doesn't look like you can mute somebody else's thread.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.