Also: 1(b) I want to read what person A writes about #hashtag 1(c) I never want to see person A's posts about #hashtag The latter can be bluntly accomplished

Also: 1(b) I want to read what person A writes about #hashtag 1(c) I never want to see person A's posts about #hashtag The latter can be bluntly accomplished by hiding everything about #hashtag, but sometimes you don't want to do that (you still want to see stuff on the topic, just not written by that person).