Streamer excluded messages.
Sometimes its nice to only chat with the chat, not with the Streamer. Because sometimes messages lead to spoilers, which could destroy the play experience of games. It would be a grade idea to make sign messages, which the chat only could reade like: #x# "Testmessage with chat communication." So the chat could communicate with eachother and keep the streamer first playtrough game expirance.
I think the better solution (since some streamers mod their own channels by themselves) would be to add a /spoiler that does what /me does except it blocks the message with a black clickable box like in discord