Everyone knows this thread is about GMWilliams, and my Hubpages feed is also quite imbalanced with respect to posts/hubs/comments/questions that are shared by her. If I scroll down the feed now, it's about 80% stuff shared by her, and 20% stuff shared by other people.
First off, I just want to say the problem isn't her, but some hidden mechanism that we can't control. I have tried unfollowing her and unfollowing people who follow her, but still I see everything she shares. My best guess is that if people follow both you and her, then you will see her stuff. And since you can't control who follows you, therein lies the problem.
The feed should be set up so that you only see hubs/posts/comments/questions by people you are following and comment/forum threads you are following and that's it. The way it is, it seems to be showing you stuff by people who are more distantly "related" to you in the follower/following scheme.
I don't think limiting how much you can share per day is a nice solution, since GMWilliams apparently finds many things worth sharing and that's her prerogative.
I also see all of paradigmsearch's activity and I'm not following him either.