Anyone who uses facebook will notice how it picks and chooses what to show you. Even if you jump through their overly complicated grouping methods, it will only limit what to show you. The only way to get a good stream is to view each person/group independently, which is over kill. You cant add secret groups to lists, so you have to view each secret group directly. RSS feeds no longer work, and stories are limited to 20 at a time.
They even scan for posts that relate to what you post, including categories and tag them. You post lots of political, food, cats, notice how the the feeds show you "likewise" posts from people. Think about that, your posts are tagged by its content.
This is a scary trend, they choose what you can see on the largest "social site". Its not social when facebook picks and chooses for you.
Facebook has already been banning content they seem offensive for political reasons. Lets not kid ourselves, the hate for anything non-progressive, left leaning gets a hammer on facebook. If enough people brigade vote on someone as offensive, it gets removed quicker than left leaning views. The stories of right wing groups getting their pages removed, or anti-feminist groups being removed is happening way to often. I've seen 2 people i follow had their page removed due to an inflammatory comment made against some popular social movements. While the censorship is really all over a sliding scale on what is acceptable, the side of safety is only for leftist views.
So, we have automated processes on what you content is shown, broken content reader, administrators removing content due to personal values, governments adding blacklists, facebook remove functionality and apis, and you being used as a lab animal in their testing.
Facebook is indeed a deal with the devil for its thought controlled social networking experience.