I'm not quite sure if this is the right place for this as it will be difficult to provide proper user feedback of why we removed a particular subscriber.
Is the ApplicationTransactionEditor generally the right place to extract mentioned phids in comments?
On the other hand in some cases we cannot really give user feedback why a user was not subscribed (e.g.: commits & diffs)
Adding a diff to a repo where the user mentioned has no view permissions the subscriber is currently still added. Still would have to find where this is donet...
Any other places?
Unrelated: Is there any way to remove a subscriber from a commit/audit ?