adding 2fa to chat as optional filter
Enable 2FA as a chat optional requirement for users to be required to have 2fa before typing in a users stream chat. This would drastically reduce the number of times a banned user will try to evade a ban to harass a streamer / disrupt chat.
On top of this it would drastically increase awareness on 2fa. Being optional it wouldn't force people or streamers to turn it on or use it. This could also help people who have 18+ Mature content streams reduce the number of people under 18 from engaging.
As 2fa already exists within the twitch platform and is required for affiliated/partnered streamers enabling this to a chat setting would be pretty easy for a developer to add into a code
Its already clearly a pretty popular idea
How it could look here: