Starting in 2021 Week 8 (Late February), "exiled" users who are related to an object (for example, as a subscriber or reviewer) but do not have permission to see that object are shown more clearly in more places in the UI. In particular:

• Username mentions (@username in text) identify the user's status more consistently and more clearly, and hovercards have contextual hints.

• The "Subscribers" curtain panel shows the status of these users more clearly.

• Differential shows exiled reviewers more clearly.

These changes aren't exhaustive, and are just intended to cover the most common cases. See T13602 for more context and future plans.