It may or may not be intentional but ignoring someone not only removes posts from someone you've ignored but also removes your own post from being seen by the person you ignored."I'm weak" (Habits are hard to break)
I have a bad habit of spending too much time on the computer. To reduce the time spent on the forum I can use the "ignore" feature - while still retaining the ability to post. I'll try it for a week or so (as the feature can be turned on & off)
So ignoring applies both ways even if you were only trying to unsee the person's posts.