Prevent Emotes from Being Shown In Chat for Blocked/Banned Users
Users who have been banned from your channel or have been blocked in chat across Twitch should not have any of their emotes be visible to you (if blocked) or visible to your channel's chatroom (if banned).
Streamers promoting hateful content often have that content include emotes for their channels that get auto-approved. While curating a blocked terms list containing emote short text helps to prevent bad actors from entering chat, often you'll see other chatters using emotes from streamers you have banned/blocked, meaning the offensive content of those streamers' emotes can get around the ban/block.
No emotes, nor the short text that represents the emotes, should be allowed to be displayed in your chat if they belong to a banned/blocked user.