[erickhill]

The default feed is "For You" which absolutely includes people/posts you never followed. Users have to explicitly choose the "Following" feed to only see those posts. And, the setting resets itself constantly. If you aren't diligent, you get the firehose whether you wanted it or not.

[MattDemers]

While I realize this does nothing for mobile (RIP third-party clients), Control Panel for Twitter [1] has been nice for me to use as a browserscript. Defaults/hides "For You" and tweaks a bunch of other stuff (hideable trends, etc).

[1]: https://github.com/insin/control-panel-for-twitter