When I say "filter this tag" or "filter this user" I mean I don't want to see it in my feed, chatter or global. That is how it works now and it works great. I can also visit the profile of a filtered user and see what he posted, that's also how I expect it to work. Why can't I visit a tag I have filtered and see the posts there? The behavior is a little inconsistent, sometimes legit content may end up in one of my filters and I may want to reconsider unfiltering it or sometimes I may want to see what other related tags or users fall in my filters to filter them too.
TL;DR when I directly visit a tag I filtered I really mean "I want to see what I have filtered" instead of getting a blank page. That is already how visiting filtered users' profiles work.