When we use tags on Twitch, it can and has alerted trolls to the streamer. This does not make the streamer themselves feel safeguarded. Now while it is known that this is not the easiest. It might be an idea to try this out:

For each tag, create a moderation kit/folder which contains grouped banned words that can be automatically added to the streamers automod ruleset list. What this will do is auto filter and timeout trolls that come into the streamers channel.

An example would be:
Black Tag - This folder would contain common racial slurs along with different iterations of the same word to catch out the trolls that try to bypass