I have read that the developers at Discouse.org are philosophically against individual user mute/ignore.
At least, that was true a couple years ago. Maybe still. It really seems to be a kumbaya mentality that is for a community of polite and kind people. Maybe they did not anticipate the vicious hate that people put into their posts about our president or the lies they post about our president’s supporters. I would welcome the ability to ignore the hate and the lies.