Hide all by CityVille on my smart list and it seems to work. The stories disappear the message below appears:
Stories hidden. Undo Stories from CityVille won't appear in your News Feed anymore.
However, when I reload the list, I still see these stories. I also don't think this is an eventual consistency matter since I've been trying to hide the stories for days.
CityVille getting some sort of special treatment from Facebook? Are they hacking their way in my lists in spite of Facebook (very very unlikely)? Is there any way to get rid of them?