perhaps have a look at this one? (edit: you already have)
but I think this is going to be a difficult endeavour. if you can somehow get the post hider to work, how are you going to filter out quoted posts of ignored users for example? the user will still see the replies to the ignored member.
Think of a long topic where a bunch of people have others on ignore. the whole topic will be out of context if that happens. All it would take would be 2 or 3 people ignoring a few others and the overlapping ignore circles would create chaos when they all post. People keep looking at this true block problem from the perspective of one user. assuming such a function is possible, as soon as it’s enabled, all these overlapping circles of ignored users will make a mess.