Automatically Enable the Mature Filter depending on Game/Category Rating
Every game that is released is released with an ESRB rating determining its appropriateness for various audiences. Twitch already collects these ratings when they add new games to the platform.
Now streamers have the option to turn a "Mature" warning for their content, but rarely is a streamers content always Mature, or always all-ages-friendly.
Given that Twitch has this information, it would be a great help to many if depending on which category you are streaming to, it automatically enables or disables the Mature filter based on the ESRB rating of the game.
For non-gaming categories, some could easily be defined as Mature or Friendly (eg, Hot tubs - Mature, Art - Friendly), and for ones where it has a broad manner of interpretation, it defaults to the streamers set state.

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DraleZero commented
This has been implemented for ESRB Mature rating.
https://help.twitch.tv/s/article/content-classification-labels?language=en_US
"*If you select a game with an ESRB rating of Mature as your stream category, the Mature-Rated Game label will be automatically applied to your stream. Twitch leverages ESRB ratings to determine whether a game is considered mature for global viewers" -
Femennenly commented
Clarity on this, allow the streamer the option of either:
- Dynamic: changes with the category
- Friendly: friendly for all categories without default Mature rating
- Always Mature: Regardless of category, content is always marked as mature