If you no longer want to see another viewer's messages on live chat, you can block that viewer. The other viewer won't see your messages either, unless you post to their channel or a channel on which they're a moderator.
- Tap the message of the viewer you want to block.
- Select Block.
Only viewers can block other viewers. Blocking a user may block them across other Google products and services.
To unblock a user, go to myaccount.google.com/blocklist.
Creators and moderators may hide users from their channel by moderating live chat.