You have a lot of different suggestions here, the latter of which have not been implemented so I will leave the topic open, but I wanted to let the thread know that we have recently released the ability to remove followers from your list by Blocking them.
You can see how to Block a user here: https://help.twitch.tv/s/article/how-to-manage-harassment-in-chat#BlockWhispersandMessagesfromStrangers
Additionally, you can see your channel Banned Chatters in your Moderation Preferences in the Dashboard
An error occurred while saving the commentDTV commented
I support this. Either let us remove banned chatters from our follow list, or implement where banned viewers are not able to browse or view your stream, period.
These should be options we can toggle off or on.