Blacklisting streams, games, tags, category
Yes, I am aware there is UnwantedTwitch extension for Chrome and Firefox.
No, we should not have to rely on a third party extension to have this feature to allow hiding a streamer/game/tag/category whom someone is not interested on.
Allow viewers more control on what gets displayed at any given time to them anywhere in the site. Can even put the data this would provide to some good use internally.