Anyone is free to connect to a channel and read chat/watch the stream. This cannot be prevented. The most you can do is to ban the bot, which will stop them from being able to post anything. Any user you ban will still be able to connect to chat, read chat, and view the stream, and as such will still show up in the viewer list. If (for some reason), you have an issue with the bot being able to read what you say, A: consider what you write in the public chat B: If possible, message the bot owner and request them to have the bot stop connecting, and check if the bot’s profile had any info on how to remove it.